Warcraft - Maiev Shadowsong, Lady Liadrin, Kil'jaeden, Yogg-Saron, Prophet Velen, Deathwing, Vol'jin, Baine or Cairne Bloodhoof and Alleria/Turalyon dual hero
Starcraft - Gabriel Tosh, Firebat (leaked already?) Selendis
Diablo - Haven't played any Diablo games but the prime evils seem pretty cool
Overwatch - fuck no