Druid gets it's last wild shape at lvl 18. So 2 lvls of splash? Arti for Arcane Lore? Gives 6% to critical. And Fighter for the extra feat. I want something fun, I'm thinking about a HO THF wielding a quarterstaff. Shillelagh for the extra damage. HO bonuses to THF.
Barb might be good instead of fighter for damage reduction. But if their dead, they can't fight back.