sorry, but none of those metioned would be able to be a head coach immediately, and despite what some will say, the Greg Marshall experiment was a failure as anyone who was close to the team would know. However, everyone of those mentioned other than Behie who still needs some CIS experience, would be in my opinion, good assistants, and from there, well, it all depends on the success and make up of the team.
The one who I think would be the first to be considered is Jeff Cummins, whose background is varied enough to be able to have instant credibility with all lot of imports. As good as Ptaszek for example may be, you know he would be a hard sell to NCAA imports, so you have to develop your cred.
There was alwasy the notion that Marcel was not respected by many players because of his football background which clearly could not compare with an NCAA background. Not that this is right and that every NCAA experienced player or coach is superior, far from it, but the reality is that someone from a school down south is just going to have more juice than a Carleton Raven grad (no offence intended to any past Ravens)