I have a soft spot for Dino inspired Kaiju.
another good one is Gorosaurus from King Kong Escapes, although he got his butt kicked (and brutally might I add) I think I liked him better in Destroy All Monsters.
I also like Angilas, Baragon and Varan, I think they look cool as does Titanosaurus.
and of course Ultraman is full of them; Red King, Jirass, Gomora, Earthtron, Silvergon. and Zetton, who is a space dinosaur.
also, Honorable mention goes out to the T-Rex from The Last Dinosaur.