As the title says. I really like the Forge Father's and intend to get some and while I will probably buy Warpath, I would also like to use them in 40k. But what army in 40k fits them best?

My initial thoughts are maybe the Stormtroopers army, sorry can't remember what they are called or IG in general. I'm not sure they would work completely as Marines, although some of their units do feel Marine inspired. I guess if I used them as Marines, I could just use Steel Warriors as Scouts with bolters.

Anyway, just wanted to ask you guys and see if anyone has an opinion on this.