Elsa Bloodstone (ok, she had a guest appearance in Jessica Jones for a couple issues, but... I doubt she will be back soon)
Tigra (again, there was a guest appearance, but felt like a blip.)
Quicksilver
Scott Lang, especially surprising since he is in the MCU, but he just dropped off the map after Spencer's solo ended
.
Was going to say Wiccan and Hulkling but apparently they are showing up soon?