I have so many.
Goblin Rogue - I just love the silhouette and I think Rogue masks are the only headgear that work on Gobbos other than goggles.
Nightborne Hunter and Mage - I already have a lot of Hunters and Mages are a pain but I like the fantasy of these combos
Dark Iron Shaman - My current Dark Iron is a Rogue (again, always loved the silhouette of a Dwarf Rogue) but would love a plate wearing dorf with board and sword shooting fireballs.
Mag’har Surv Hunter - With Hellscream’s Axe and a wolf? Too many hunters right now though (Zandalari will be Surv Hunter)