A lot of people will be tempted to refer to users based on training or spirit, but the simple and perhaps uncomfortable reality is that one of the most important factors in determining the outcome of a fight, if not the single biggest factor, is sheer size. Bigger people -- even if they're only bigger by virtue of being taller or fatter -- have more weight to throw around and more muscle to do it with on average.
To that end, it makes sense to simply select the biggest and strongest teammates like MilitantIrishman, Andrew, and -- subject to physical review -- Lopez. The same logic suggests that I'd be one of the worst male users to pick.
@SW-User @PiecingBabyFaceTogether & his 200 pound wheelchair would be a pretty rough customer, but I assume there'd be a high risk of someone jumping on top of it and ripping is throat out.