I don't think it'll be Hagrid because he can't keep a secret very well! So I think he's out as for Fletcher...
Probably not due to his unreliability! Remember when he was supposed to be watching Harry and left to pick up some stolen cauldron's or something to that effect! Lupin, I believe would be a very good choice but, he is a little incapcitated at least once each month! Mrs. Weasley would be another good one but she's probably focused on Bill's wedding. Mr. Weasley could be an option but I've never really pictured him as a LEADER per say. But, who knows, maybe he'll step up! The options are rather limited aren't they?

What do you think about Tonk's taking over? She seems to be a strong person but is she organized enough to run a group this size on all the different fronts that have to be going on at the same time? Probably not!

Well, all my ideas are gone, anyone else have any that I'm overlooking?