These characters can be powered individuals or those with extraordinary talents that make them useful to the Avengers. They can be Canons and OCs.
Steve Rogers *Captain America* - His first movie is loosely canon, but the rest of the MCU is not.
Co-Leader - This spot can be a canon or an OC.
Agent Phil Coulson or another character that can be another Canon or an OC.
The following Canons are taken:
Christopher Powell *Darkhawk* - Future Member
Natasha Romanoff *Black Widow*
Simon Williams *Wonder Man*