#5 Chris Jericho

After a floundering career in WCW, Chris Jericho entered WWE in 1999 to much fanfare. Chris had what many, including WWE, consider to be the greatest debut in history, and it occurred on Monday Night RAW on the August 9, 1999, episode.
Jericho was quick to provide some incredible RAW moments as on the April 17 episode of RAW, Jericho upset Triple H in a WWE Championship match as referee Earl Hebner made a fast count when Jericho pinned Triple H, causing Jericho to win the title. Hebner later reversed the decision due to pressure from Triple H, and unfortunately, WWE does not recognize Jericho's reign as Champion, but it did provide an incredible night.
R-Truth wanted to 'kill' former WWE writer. More details HERE
Jericho would have countless more memorable matches and moments over the next 17 years and he is still not finished. Most recently Chris Jericho and Kevin Owens provided one the most recent excellent RAW moments when he hosted the first ever 'Festival of Friendship' last February.