Hmm my gut feeling tells me it "should be possible" as long as you max it out to 4 characters. I mean all that would need to be accomplished is "hiding" the other 3 UI frames and when you "res" (like you did with toorum) it should "unhide" one of the UI elements and give that new character the stats/skills/name etc of the character you are supposedly resurrecting.
Now I didn't write the code (although I did write plenty of code in my lifetime), but just quick thinking about how the game works... that should be doable... if you want more than 4 however you would have to do a tad more work and depending on how the code is written it could be anything from relativly straightforward to a nightmare.