I think it would be a hell of a fight Thing and Ironclad- http://spider-bob.com/villains/marvel/Ironclad.htm
I think it would come down to Reed pulling a gadget or plan out of his stretchy a**.
Ironclad isn't just another "metal guy". He controls his density, and has been around almost as long as Ben.
As for the ease in beating X-Ray. I don't se it happening. He can use any number of radiation types to get through to Sue.
None of them can stand up against Vector, and Vapor can do her dirty work on Reed or Thing, or Sue, if she gets her with her guard down.
So, it just comes down to how they match up, and who against.
But, it certainly would NOT be simple.