I don't really know these characters at all, other than hercules.
I heard Luke Evans would be playing Hercules? He's LGBTQ right? so it makes some kinda sense, gay guys who are action movie stars are rare.
Not jacked enough to play Hercules IMO, would rather see him as captain Britain.
Marvel phase 4 & 5 needs the following characters (just my opinions):
Hero:
Fantastic 4 with John Krasinski and Emily Blunt as Mr Fantastic and Invisible Woman
Captain Britain by Luke Evans or Fassbender
Blade by Mahershala Ali or John David Washington
Villain:
Green Goblin/Norman Osbourne by Mathew McConaughey or Christian Bale
Kang the Conqueror/Nathaniel Richards by Cillian Murphy. Also he must have a solo movie directed by Chris Nolan...imagine the time shenanigans
Dr Doom:
.again: Cillian Murphy would be good in this role.