Pair of Characters working well together

[Ferret]

Rogue + Monk (flank & spank)

LOL, Why not a Barbarian cheiften (multiclassed with fighter) and the shamen a druid(multiclassed with barbarian?) or Adept(multicalssed with barbarian?). One does the thinking the other does the smashing, they trust and respect each other because they know they can do things the other can't.