MARTHA JONES. Nuff said.

Ioreth from LOTR, the healer from the Houses of Healing

Dr Egon Spengler ♥ "Back off man; I'm a scientist."
ETA Oh god he didn't even say that. My geekness is shamed. :( I still love Egon, though.

Doc Cottle (Battlestar Galactica) He's snarky and rude; he smokes around his patients and he doesn't sugar coat things.

Dr Karl Kennedy (from Neighbours) He's the only doctor on the whole soap, which means he specialises in everything from oncology to gynaecology and even emergency surgery. XD He knows everything and does everything that involves scenes in the hospital.

Who's got two thumbs and likes sarcasm? Dr Cox. (As a sarcastic bastard I love him; as an actual doctor he lacks a certain something. ... Bedside manner, perhaps.)