Black Widow: 

Captain Marvel: 

Scarlet Witch: 

Wasp: 

She-Hulk: 

Gamora: 

Ms. Marvel: 

Amora/Enchantress:  

White Tiger: 

Black Cat: 

Spider-Gwen: 

Shuri: 

Gwen: (incest-wincest) 

Julie: 

Charmcaster: 

Kai:  

Lucy Mann: 

Attea: 

Looma: 

Ester: 

Rook Shar: 

Elena: 

Eight-Eight: 

Euince: 

Sunny: 

Molly: 

And there are these females since there's been crossovers, but only if that's okay. 

Drew Saturday: 

Circe: 

Rebecca Holiday: 

That's for the harem. Originally, I was adding Justice League as well since it had some crossovers with Avengers and RWBY, but I'm not sure. 

It could be possible, but only time will tell. If it is possible for the Justice League and/or RWBY, I have some ideas of some Grimm like super-villains based on the Squadron Supreme, the evil Justice League from Suicide Squad, and/or Crime Syndicate.  

And if we're doing RWBY as well, I recommend we add only Team RWBY as the harem members since we've already they're the only ones who can travel to other dimensions via portals. 

Anyhow, let me know what you guys think at the comments below, peace out and enjoy!