Aries and Roode, and they need to lose guys like Ryback and Axel. Matt Morgan i had expected to see in WWE after he got shit on all day in TNA before, but i saw he's stacking paper in a hospital job IRL now. Sting? lolno, and who is to say he wouldnt have gotten the WCW treatment almost every other guy to come over faced?
What WCW treatment? A lot of guys who came over from WCW ended up doing well for themselves. Booker T., Goldberg, Rey Mysterio? People complain about Booker T. jobbing at Wrestlemania X-9 after the entire "Your people don't win world titles" angle almost demanded that he win, but there were reasons for that and he had a pretty good career otherwise. Goldberg's whole world title win and push was somewhat botched imo, but he wasn't completely buried as he was still put over WWE's own top stars like The Rock, Triple H and Brock Lesnar. Mysterio won the Rumble and captured both world titles at some point, which is pretty good for a guy his size. If you count guys who came over just shortly before the demise of the company, then Benoit, Eddie, Jericho and Big Show all did well for themselves.
The company originally had plans for Scott Steiner, Mark Jindrak and Sean O'Haire as well, but they didn't pan out for several reasons. Steiner put on shit performances at the '03 Rumble and No Way Out PPVs, Jindrak was supposed to be the fourth man in Evolution but those plans were axed when he got into a (staged) real-life fight, and the company saw star potential in O'Haire but his tendency to stir up shit outside the arenas and get into bar fights on occasion put an end to that.
No reason to assume Sting would have suffered for having come to WWE just because he had the stigma of being a WCW legend first. Not gonna say that all the WCW guys were utilized as best as possible either but that's also true of the WWE's own stars, both past and present.