I read Roadblock can use the rocket launcher better than any other Joe. Not sure if it's true, but Cobra Commander went down pretty fast with that combo.
Also in case no one noticed, General Hawk jumps higher and higher the more bases you clear. He has the second highest jump height in the game, technically.
But yeah, for all you guys that like Stormshadow or Snake Eyes, try playing them only with their default health. That's like, what, 3 or 5 hits and then game over? Very little room for error.