Thanks for the comments guys, and here's recipes.
TROFFAR THE TERRIBLE
head - ROTS Ask Aak
torso/arms - SAGA Garindan
legs - Evolutions Darth Maul
jacket - GI JOE figure
REBEL HEAVY WEAPONS TROOPER
head - POTJ Rebel Fleet Trooper
torso/legs - 21st Century figure
arms - POTF2 Endor Rebel
gloves - SAGA Endor Rebel
boots - POTJ Rebel Fleet Trooper
CLONE SAND TROOPER
head - ROTS AT-RT driver
body - ROTS Commander Bly
pauldron - SAGA2 Sandtrooper
On the Rebel Trooper, I used the Scorch gun because I thought it looks kind of like a missle launcher, I could see this guy shooting at AT-ST's, running around in the woods.
For the Clone Sandtrooper, he's just clean because he hasn't walked off of his drop ship yet. I wanted to make a clean version to see how it turned out, but I'll probably add a bit of weathering to him soon.