Chris Walby should definitely be one of the 4. It should be Stegall, Pleon, Walby and then one other person.
I think the first 3, (Stegall, Pleon & Walby.), are kind of no brainers.
The fourth one though is debatable.
As long as I have been alive the Bombers have won Grey Cups with superior defence. So I think it would make sense for at least one of the 4 to be a defencive player. Who is the greatest defencive player to ever play for the Bombers? Greg Battle? Doug Brown? Rod Hill? Juran Bolden? On defence there is no clear cut winner, like there is on the offence, but I definitely think there should be at least one representative on defence on the gates.