Maybe the Falcon would make a good addition. Moon Knight too, since he's more Wolverine-like than Ares.
Archangel wouldn't be a good idea, since he work with the non-registered Hercules.
Why not think outside the box for fresh blood and pay tribute to a classic issue in the early years of the team? Thus, I would select a re-powered and reformed Blob, Whirlwind, and Tiger Shark as an homage to the former villains-turned -heroes, Hawkeye, Quicksilver, and the Scarlet Witch in Avengers #16