McCoy
Crusher
Pulaski
Culber
In order of appearance, not preference.
Who I didn't choose and why: Bashir is a little too smug and holier-than-thou, The Doctor can get overbearing, and Phlox is okay but a little too bland. I like Boyce, but we don't actually see him do anything as a Doctor. Thus I can't include him.
Who I did choose and why: I like McCoy and Pulaski because they have very forceful personalities. I like Crusher because she's very understated but also very passionate at the same time.
Before the third season of DSC, I wouldn't have listed Culber, but during the third season Culber really came into his own. He's a great Doctor and a great Counselor too. How he handles Georgiou in S3 is a loooong way from how he handled (or rather didn't handle) AshVoq in Season 1.
EDITED TO ADD: TOS McCoy and Kelvin McCoy are pretty similar. There's not much of a difference, if any difference at all. So I think including both of them in my list feels too much like cheating. TOS Kirk and Kelvin Kirk, I can see a difference. TOS Spock and Kelvin Spock, I can also see a difference. TOS McCoy and Kelvin McCoy? Not so much.