I had a hard time putting together the heroes, but here we go - from top left to bottom right;
- Maldraxxus Abomination Patchwerk
- Venthyr Hunter Tess Greymane (Castle Nathria raid leather set)
- Ardenweald Ysera
- Kael'thas from his Castle Nathria encounter
- Night Fae Forest Warden Omu (resembling Night Fae covenant plate armor)
- Kyrian Sir Finley Mrrglton riding a Steward (lol)
- Ascended Kyrian George
- House of Plagues Lich Baz'hial (bears a resemblance to Margrave Stradama, final boss of the Plaguefall dungeon)
Names of the skins:
- Finley of the Kyrian
- George the Ascended
- Ysera of the Night Fae
- Faewarden Omu
- Necrolord Patchwerk
- Margrave Baz'hial
- Venthyr Tess
- Chained Kael'thas