I know he played an Admiral in TNG, but I'd actually love to see Terry O'Quinn from LOST as a captain - he was just so damn good
I think hes great. But I think they will think hes too old. He turns 58 this year, and hes not even a "young" 58. He was only 41 in TNG and is actually slightly younger than Jonathan Frakes, but looked and seemed much older, which being bald often does. I certainly would like to see him in a Trek show in some capacity or another though.