Obviously VRS is extra bad news in the V-22, although it is less susceptible than classic helos.
How about the CH-46 and/or Chinook?
As a former CH-46 guy, I can say I've ever seen VRS or heard of it happening to anyone I knew, though in reality when there is a mishap it can be difficult to say whether a crash was due to power settling or settling with power.
As far as tandem rotors designs go, though, I did know a few guys that encountered retreating blade stall on the aft head only during "high speed" runs--they got it back under control after a few seconds of anxiety.
Besides speed, exactly what type of 'performance' did you have in mind when you stated this:
"As far as performance, though, nothing else holds a candle to it."
Speed is the big one, obviously. Pushing in excess of 240 knots at sea level makes a big difference (don't believe the g2mil.com lie that it can't fly fast down low). Having a service ceiling greater than 20K' helps too. Superior countermeasure equipment and much greater maneuverability also help defeat threats.