I think Raul will have the final word (or biggest say) for the very reasons you mention - he will also be given the title of Director of Football once Arsene goes
It's possible that Mikel might just have that "magic", I suppose, but then so might Steve Bould (what of Wenger's coaching staff; are they off too?) And Enrique may bring Lionel Messi with him, which would be a good thing, I think we can all agree.
Personally, I feel there are probably quite enough Luises about the place already, what with you and ben Monty. Ditto: Germans. Natürlich nicht böse gemeint.
I thought one of the journo chaps on Sunday Supplement made quite a good point re who we appoint next. It was more or less that there is no obvious choice at this point i.e. a Klopp, Pochettino or Pep, so rather than reach for a young manager who might fail badly (which would be a disaster after letting Wenger go) the club should appoint someone they see as being able to take the club forward for the next 2-3 years as they look for a long term solution.
That sort of feels like Ancelotti or Enrique - neither of whom I can see being here 10 years from now