3. The Doctor
Tuvok would have rated higher if had more to do. I like ALL the characters other than Kes though she has risen in my estimation over the years to a solid meh.
For actors I'd put Mulgrew, Ryan and Picardo in equal first, with Phillips and Russ as equal second. Everyone else muddles in the middle and Beltran gets dead last. If only he could have brought to the character the performance and nuance that Ryan did for 7.. I might even be a J/C'er if that had been the case.