Post only one name of a beast you want for the 3 3/4" collection that's different from everyone else's that is listed below.
Your post should have one beast's name, and if need be it's source or description.
The Sando Aqua Monster, from TPM made like a big Shogun Warrior Godzilla toy of old.
The Aqua Monster figure should be able to eat Gungans (especially JarJar) and you can open up a hidden hatch in the figure's stomach to get your figures out again.
I'd make the Sando about 14-18" tall (underscale yes, but reasonable for retail). Kids that like dinosaurs and the likes may appreciate this and help it refresh interest in SW.
It should feature open (cheap) packaging and it would look great with the Action Fleet Bongo Sub.