A few I could name that are currently coaching/managing but in my time as a supporter (since Mid-90s) I would have to say Roland Nilsson, absolutely class player, seemed to be level headed and on the straight and narrow, plus hasn't done too badly when managing Scandanavian teams.
Ex england manager Kevin Keegans still out of work, not sure if he counts though as he only had shoolboy trials for cov.
Oh, we could,nt afford him and I would,nt want him anyway.