Timothy Dalton is gonna kick ass, so tall and big, he will be so intimidating and a really big over powering pressence, hopefully.
But as for other timelords, well, Stephen Fry seems to come to mind, John Simm i wouldve loved to see him as The Doctor, and i believe he was also a contender back in 2004 for the series re-birth, but alas, we got him as The Master, which by all accounts, trumps The Doctor.
As for other male Timelords, Ruper Grint from the Potter movies, not only do a few of us here want him as a future Doctor, but he would also make a good Timelord, not only can Grint act, he has that eccentricity about him that could pull off a convincing irratic/eccentric Timelord.
I would like to see more female timlords also, that would be a match for The Doctor on many scales. Actors such as Tamsin Crieg (from Black Books and Green Wing to name a few) and also maybe Maggie Smith as a Timelord elder.