Callaway or Cobra, probably. Srixon/Cleveland/Never Compromise also brings a ton of options to the table if all owned companies of a brand are in play.
Since being a member of THP I've been all in with Titleist, then went with a combo bag, then was all in with Cobra, then all in with Wilson, then all in with Titleist again. Today I'm all in with Callaway and don't see that changing anytime soon.
Of course this is all minus putter, my putter has always been SC.
I think I'd be fine (with enough practice) with bagging any major OEM brand out there. If I had to choose, I'd probably do Callaway or Cobra. But if Cleveland/Srixon handed me 14 free clubs I wouldn't complain.