In my Classic/Henkei display case:

Hasbro Classic Megatron - Megaplex (Henkei Megatron's clone/decoy)
Nemesis Prime - Motormaster, another evil clone of Optimus Prime
Universe Cyclonus x 2 - Henkei Cyclonus' "Armada"
Treadbolt - Jetstorm... Skyfire's twin, fire and ice~ (Got this idea from Animated, my Classic/Henkei Bots can use more air power. )

Also I might display both Classic Jetfire (with helmet) and Henkei Skyfire (without helmet) together... and pretend Jetfire and Skyfire are separate characters...

Currently I'm very tempted to get 2 more Acidstorms and just pretend all 3 Rainmakers are now green... A lone Acidstorm in my display case just doesn't look right...

And if we turn Sunstreaker's body around and attach a Sideswipe Head... instant Tigertrack!