Wouldn't blank-sensei tranlate just fine to (with perhaps the exception of teacher) dr. blank, mr. blank etc.
Taking in concideration how much of an asshole the community is, that will bitches about every single thing, I think it's preferable to keep honorifics untranslated to avoid inconsistency. Pretty much everyone knows what they mean anyway and if there's some special case (like how Nozomu is a teacher sensei while his brother (?) is a doctor sensei) it can be dealt with using TL.
Anyway, getting pretty /jp/ here, MU is up so huzzah.