COG. The first creation of his that got my attention. I built a pair of these myself. They're very sturdy. You could probably toss them against the wall without breaking them.
Grunt Mk.1/Mk.2. His first attempt to create a "generic" frame similar to the Chub.
Groundhog. The second of Pasukaru76's attempts at a "generic" frame.
Black Widow Company. A bunch of Battletech mechs in microscale. These are not his only ones. Seek them out.
Shorty Mk.2 The third of Pasukaru76's "generic" frames. MittenNinja built a squad of these recently.
Reinventing the Wheel. A recent creation -- small, but full of personality.
You really should look through his photos, he has a lot more than just mecha. He really needs to sort them better though. Just sayin'.