The Justice Society!
Set it in the forties and call it The Golden Age. Have a small main cast and do rotating guest and recurring characters to showcase the heroes in the 1940s. Base the plots off of golden age storylines, updated for modern audiences.
For villains, Solomon Grundy could be a cool season or half season horror mystery/ villain.
I’d love live action, but animated could be good too. I dont care much about ratings as long as the overall tone of the show is hopeful…I’m tired of comics being depressing!