In politics, predictions made when there is no short-term prospect of a change of leader can become moot by the time that change occurs.

In the past it has been generally easier to predict leaders on the Fianna Fáil side. Micheál Martin, Brian Cowen, Bertie Ahern, Albert Reynolds and Charles Haughey were all obvious contenders. In marked contrast, Enda Kenny would not have featured as a strong contender on the Fine Gael side in the late 1990s, but then circumstances conspired to elevate him to the leadership.

Which of today’s strong performers could become tomorrow’s political figureheads?

FINE GAEL

Leo Varadkar
One of the most capable performers in the Dáil, he has been a rising star since emerging on the scene a decade ago. He is very bright, ideologically driven, a clear thinker. He can absorb lots of information and then does what few politicians do well: makes clear decisions and shows good management skills. There's a bit of spin to his straight-talker reputation. He is not collegial, which sometimes annoys colleagues. It's impossible to say if his disclosure last weekend that he is gay will have an impact, positive or negative, on his prospects.

Simon Coveney
He's still in his early 40s but has been around for a long time. He's not the world's greatest debater and is very much a policy and details person. He has been a good Minister for Agriculture and thinks his way through positions – he has taken a contrarian stand, for example, saying "clean and green" Irish agriculture should get exemptions from climate-change action. Comes from a long-established Fine Gael family and would appeal to traditionalists. His comments this week about potentially sharing power with Fianna Fáil were quite damaging to him.

Frances Fitzgerald
Unlike Varadkar and Coveney, Fitzgerald sided strongly with Enda Kenny in the last leadership battle. She was rewarded with a senior ministry and has been promoted to Justice. She's also playing a key role in electoral strategy. Some colleagues criticise her for being slow to decide on issues such as publication of the Children and Family Relationships Bill. Others like her calm and steady style. It has certainly worked for her since she took over from Alan Shatter. The children's-referendum campaign was not her finest hour, however, and the same-sexmarriage referendum will be a huge test.

LABOUR

Alan Kelly
Kelly could be the first leader of Labour based outside Dublin since Dick Spring, two decades ago. He trounced the opposition in the deputy-leadership contest and is the favourite to succeed Joan Burton when she steps down. He has a reputation as being assertive, although some colleagues would prefer a Labour leader who was subtler and more urbane.

Alex White
If you are looking for subtle and urbane look no farther than the deputy for Dublin South. He contested the leadership and has loyal supporters but has not made the same ministerial mark as Kelly. It depends on what kind of leader Labour wants after the next election. White might be seen as a good compromise or caretaker choice. His main challenge is trying to retain his seat.

FIANNA FÁIL

Michael McGrath
It's very strange for the leader of Fianna Fáil and its finance spokesman to share a constituency. It is a sign of Michael McGrath's strength that he managed to win a second seat for Fianna Fáil in Cork South Central in 2011. McGrath, an accountant, is very assured in his brief and a prodigiously hard worker. He has a quiet, self-confident style and is not given to dramatics. He's the obvious frontrunner in Fianna Fáil. What might stand against him is that he's quite conservative on moral questions.

Billy Kelleher
Fianna Fáil has a handful of bright TDs in their 30s and 40s, including Timmy Dooley, Niall Collins, Dara Calleary and Barry Cowen. But the popular Billy Kelleher has been very strong since taking over the health portfolio. Humorous and puckish, he can also bring gravitas to his Dáil performances when required, and has delivered well-researched critques of health policy. He is also more liberal than McGrath. He made an outstanding speech last year on abortion.

SINN FÉIN

Mary Lou McDonald
How long more will Gerry Adams remain as leader? How long is a piece of string? To the outside world Mary Lou McDonald seems the obvious choice to succeed him. She is articulate, intelligent and politically ruthless when necessary. She appeals to non-Sinn Féin voters in her roles as deputy leader and spokeswoman on public expenditure. But although her defence of Gerry Adams and her recent use of Dáil privilege to smear, without any evidence, former politicians as Ansbancher account holders may appeal to core supporters, they could dilute her appeal to prospective supporters.

Pearse Doherty
He has mellowed a lot in the past few years. The first Sinn Féin politician to give credibility to the finance brief, he is an excellent debater and commands the portfolio very well. Doherty discounts any leadership ambition but is the closest rival to McDonald in the South. The two strongest northern contenders are John O'Dowd and Conor Murphy.

`REBOOT IRELAND'

Lucinda Creighton
There's no doubt that Lucinda Creighton will lead her new party – whatever they decide to call themselves – into the next Dáil and possibly into government. She is outspoken and very ideological and would have been seen as a potential future leader if she had stayed in Fine Gael. The new party will be a big gamble for Creighton: the weight of history is against smaller parties surviving beyond the medium term. At present it seems she has burned her bridges with Fine Gael, but, like her political forebear in Connacht James Dillon, she may eventually return to the fold.

INDEPENDENT ALLIANCE

Shane Ross
Shane Ross, who is as opportunistic as he is talented, is likely to lead a group of Independents into the next Dáil and possibly into the next government. Ross does passion and outrage better than most Irish politicians and is astute when it comes to choosing his campaigns. A brilliant speaker, he also has a knack of leaving his past behind. He was an enthusiastic supporter of Michael Fingleton and Anglo Irish Bank in the past. Ross may be a maverick but as a former stockbroker and senior journalist with the Independent group he is seen very much as an establishment figure. If he and his colleagues enter government he would be the obvious contender for the most senior ministerial portfolio on offer.

NEW LEFT ALLIANCE

Richard Boyd-Barrett and Paul Murphy
It's unlikely that any alliance that comes out of smaller parties and groups will itself become a party in the short term. So the question of a leader may be moot. That might not be a good tactic, as the lack of a leadership figure may have contributed to the demise of the United Left Alliance. If there is a new alliance the most obvious contenders to lead it would be Richard Boyd-Barrett and Paul Murphy. They are similar in terms of style and presentation – down to the megaphones that both carry in the boots of their cars. Boyd-Barrett, who represents People Before Profit in Dún Laoghaire, has been a very effective TD and brought a lot of visibility to the street campaigns and protest favoured by the militant left. Murphy is a recent arrival but is committed and well informed. He got a savaging from opponents for the water-charge protest against Joan Burton, but the controversy did him little harm among his supporters.