Yeah you don't want them to go down the TNA route and simply hire anyone previously affiliated with WWE.
That being said though, AEW will more than likely be consistently better than TNA ever was, so you could make the argument that it wouldn't be a bad move. I think Harper should go, always been a big fan of his and it'd be nice to see him outside of WWE again. I'd love to see Killian Dain go too, I didn't know who he was for the longest time but after I looked into him, I was a fan. He's a big man that can move and that's pretty underrepresented in WWE, or at least it was the last time I watched any of their shows.
Asuka, Kairi Sane, and Nakamura would be great, but I think I'd rather see all three of them in Japan again. Wouldn't be upset if they got out of WWE and went to AEW though.
Don't care where the others go, lol.