A bard can be a darn fine warrior (especially if ya'll agree arcane art can affect oneself)!
Charming & Open is excellent in a fight, when used by a spider-man-style talkative warrior. Especially with Devious.
Cha + dex as top two stats plus a dueling rapier is an excellent choice.
Cha + con for a defensive fighter... not much H+S but buff, heal, and defend (and deal increasing damage on defend). Also comboes well with Metal Hurlant.
Duelist's Parry is a free armor for a fighting-bard. Duelist's Block is even better.
Two multiclass options before level 6 is great...
My overall point, I guess, is that in Dungeon World, it's very easy to have someone play outside of (or in addition to) type, based on stat, move, and gear choices.
There's no reason he can't be a bard *and* a warrior.
Or the druid can be the warrior (seriously, druids **** things up in a fight if they want to).
A thief can be a nasty fighter, too.
War-wizard? Yes please.
You get the point! :D
- Alex