Clockwerk, Morphling, Shadow Fiend, Earthshaker, Windrunner, Venge, CM, AA, Visage, Invoker
Something like that mb
but Nerubian weaver, Pugna, Lion, Witch Doctor, Enigma, Bat rider, Medusa, Venomancer, Tide, Doom, Puck, Furion, Syllabear, PotM, Storm Spirit, Lich see quite a bit of play as well
and then there are heroes that are used on occassion like Spectre, Enchantress, Dark Seer, Necrolyte, QoP, OD, Razor, Chen.
You can use almost all heroes in one way or another in cw.