Does anyone know of any drivers who should be included on F1 Drivers lists, who are not?

Example:

Gary Hocking:- Took part in an F1 Practice session a week before his first race, but was killed during the session.

Jordi Gene:- Attended the 1993 South African Grand Prix, with the Bravo F1 team, but was not allowed to race.

Fridat Test Session Drivers:- Need I say.