#6 Eddie Guerrero

Eddie Guerrero is the third man to feature on this list as a winner of both the Grand Slams and he completed the original one after becoming WWE Champion on the 15th of February, 2004.
Eddie was one of the many cruiserweights that migrated from WCW to get better opportunities. He did get those, but not to the level most people wanted him to get.
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He was in the mid-card for a majority of his run, but he got so over that WWE ultimately had to push him to the top.
His run at the top of the card didn't last too long, as Eddie suffered from severe self-confidence issues and dropped the belt to JBL soon enough. It's a shame that right before his next major push, Guerrero passed away.
He has had a good run, where he became essential to all the purists watching, however, he didn't really get the spotlight as a bonafide star even though he went into a WrestleMania as champion. This lack of long-term investment is the only blotch on a seamless career.
Grade: B+