Ioan Gruffudd is
Tony Blair
Well, he's approximately 800% better looking than Tony Blair, but bear with us. His rather good performance in Amazing Grace showed that Gruffudd can convince in serious roles as a divinely-inspired statesman, while his Lancelot in King Arthur showed he can convince as a sidekick. And of course, after 5th Officer Harold Lowe in Titanic, we know he's got a capacity for getting entangled in disastrous situations.