well 5 is a rather small number but I'm sure it can be worked with
Tajiri takes my #1 spot. I loved Tajiri in ECW. The guy was nothin short of awesome. I could not wait until he came ot the WWE. He finally arrives and it starts out ok but now look at him. He's been watered down to like almost a mere shadow of himself. He has teh talent and abilities to be a top cruiserweight and they send him to Raw to be buried. Notice that is what usually happens when you are sent to Raw... you get buried. And speakin of burial...
Kane takes the #2 slot. Kane was supposed to be a monster. Kane was supposed to be unstoppable. After the mask was taken off it started off that way then he couldnt' beat Shane McMahon for anything. He was scared of Shane McMahon. He barely won that then loses at Mania to a Cowboy. A badly dressed cowboy at that. I mean talk about bad... Take has been out since November and returns in March and beats a guy that has stayed in the ring all that time. Then Backlash comes and it's Edge. The guy has a cast on his arm and Kane still cannot beat him. Kane loses again and this time to Edge. The monster has been tamed and is now no more dangerous than a cute cuddly kitty. Which leads me to my third person.
Matt Hardy... and no he has nothin to do with a kitty. But Matt was the man on SD! I would watch SD! just to see what he was gonna do and hear what he was gonna say and watch his matches. He was gold on SD! and then where did they send him? Raw.

He started out aight but got buried and now is in a jobber pit. It's like he cannot escape it for anything. The pull is so great and heavy on him that noone can save him. He is burnin with Kane in there. And now they both are in a feud... hopefully one of the two will get somethin good out of this feud... hopefully.
#4 O'Haire was super misused. Luckily he is out of his contract and is already elsewhere so I won't stay on this boat too long but I will sail to my fifth choice...
Ultimo Dragon. If you look in the dictionary for misuse... you will see Ultimo Dragon. The guy is gold... was gold... and will be gold. Vince didn't like his style so he had to start jobbin. He had to tone down his style... slow it down for the wrestlers.
I don't think i can stop at 5 so I'll just go one more.
RVD- the guy could have been champion. He had a large fanbase. He had it all goin for him and WWE look at it and ignored it. Probably tried to alter it and edit the chants to make it seem like the shamp was still more popular than RVD but after they dropped the ball that year they had a second chance and still dropped the ball. Talk about suckin they could have used him in a big way and chose not too.
Other notables: Raven, Saturn, many others