Let's separate your list into two groups - guys who succeeded in WWE and those who failed. There may be some disagreement about who belongs where, but let's pick a starting point:
SUCCESSES:
Flair
Road Warriors
Jericho
Mysterio
Big Show
Benoit
Some of these people you can't deny. It's amazing that he managed to bury Dusty Rhodes the way he did, but it helped that the WWF didn't tour his old southern stomping grounds much in the early 1990's. At any rate, Ric Flair is Ric

ing Flair, and the Road Warriors are the Road Warriors. There's no rightful way you could bury them they were so over (RW so much so that there was a level of crowd pop wrestlers named after them).
Jericho and Benoit, OTOH, came to WWE to stick it to WCW. Not because of money or challenges or working Wrestlemania. But because they weren't happy in WCW. Remember that Benoit won the WCW Championship (in Cincinnati, OH!) and the next night was with the "Radicalz" on WWF Raw. Jericho's unhappiness with WCW (and Bischoff) was so well known that people knew about it publicly before he even left WCW. Those were Vince sticking it to WCW.
Think about the number of times that WWF/E loved to remind you that WCW fired Steve Austin by fax or fedex or somesuch, saying a guy in black tights could never be a draw. Steve Austin had a decent WCW career, and some damned fine matches, but nothing truly, truly legendary. I doubt they looked at him as a "WCW guy."
Mysterio, I dunno. WWE didn't immediately bury every ex-WCW talent. There's a reasonable exception.
FAILURES:
Luger
Goldberg
Booker
DDP
Steiner
Dusty
Luger was a successful main eventer? On what planet? He was pushed to the

ing moon by WWF, with a bus, and a bodyslam on an aircraft carrier, and stupid tights. Keep in mind he was pushed initially not as a wrestler, but as the centerpiece behind the WBF. He wasn't going to be a wrestler for Vince (maybe McMahon does know a bit about wrestling after all) until the WBF shit the bed in a way that makes the XFL look kinda sensible as an investment strategy. So he was pushed and pushed and pushed as a bodybuilder - Vince tried to take that momentum and carry it over into the wrestling ring. But for Luger, it never worked. Fans did not take him seriously at all as a main event guy.
Goldberg? Buried. They knew how to use him, but they refused to treat him as a monster. They stuck him with Goldust for a bit.
Booker? Buried. They knew how to use him, but they refused to treat him as a monster. They stuck him with Goldust. Wrestlemania X8 main event vs HHH was the culmination of WWF vs WCW (symbolically) as Booker T was treated like a bitch in a racially-tinged angle with HHH, and did the job in one of the most embarrassing "take your sweet ass time to come over here and pin the man following hitting the pedigree" WM finishes ever. I still cringe when I see that. Booker, like Dusty is known for his polka dots, is known in WWE for doing a shitty rendition of a breakdancing move.
The difference b/w Booker and Goldberg is that Booker hung around long enough. Much of the people who got over dealt with incredibly long periods of being hazed. I know you think WWE is justified in not pushing the Chuck Palumbos of the world, but compare what you think is wrong w/ Chuck to the guys they have crammed down our throats over the years - the Chris Masters, the other dudes in Nexus and Corre who aren't Wade Barrett. Anybody 6'2" and cut like a mother

er gets the Vince McMahon is totally heterosexual boner of approval, and is pushed to the moon, whether fans like it or not. Ex-WCW talent is hazed, in a very public fashion. Even when they aren't in the company (e.g., DiBiase's servant being named "Virgil" as a slam on Dusty), that holds true.
DDP? There's no way you can hold him responsible for the shit hand he was dealt.
What you're doing is the pro wrestling equivalent of blaming the victim. DDP spent an entire summer jobbing to the Undertaker like he's Barry Horowitz, blows 10 grand on his teeth, and spends the next year saddled with a Simon Dean-esque motivational speaker gimmick - and you blame him for not getting over?
Jaysis. I mean, I understand wanting to not be wrong about something, but get

in' real, man.
WWE tells us who we want to like - even when it's people we actually do like.