Identify That 'Mech Pt 2

Continuing on in my public display of ignorance, here are four more 'Mechs to help me identify.

This one I call an Orion. Am I right?

I think the next two are Orions. They are just posed differently. Correct me if I am wrong.

I can't identify this one. Help me if you can.

Again, thanks for reading. I appreciate any help you can give in relieving my ignorance.

-Dave