Hmm... not one yet with sorceror... though, trying to think of some myself, I can see why.
Though, for Invoker/Sorceror -- Inate?
And how about Cleric/Warden -- Preserver?
Avenger/Warden --Eco-terrorist? That's a bit too modern of a feel to it, though...
Additionally, some of the monk combos are very evocative of some of the common characters from martial arts movies/manga:
Cleric/Monk is a good shinto/shaolin style mystic
Monk/Sorceror are great for the magic using baddies in kung fu movies.
Don't know what names to give them, though... perhaps Monk/Sorceror = Wuxia, and Monk/Cleric = Mystic.
Fianlly, with the Essentials wizard having a build with the same name, should we still call the Invoker/Wisard an Evoker?