Yep, I'm in that exact role in a current RP, whereas my character is essentially the field medic. Although she isn't useless with a firearm or some self-defense, her strong point is most definitely triage, and being able to heal her teammates without folding under extreme pressure.

The "support" archetype is actually fairly new to me as I've almost exclusively rolled some kind of front-line fighter/tank in either table-top RPs or video games. But, I think a support can be just as tough a role because you are essentially filling in all the missing pieces.