5. Yokozuna (April 1993 - April 1993 and June 1993-March 1994)
http://www.youtube.com/watch?v=rkv885lQrFo Yoko may well have been the most agile 600 lb athlete ever but am not really sure how much of a compliment that is really. He was a truly dire and tedious world champion and even when matched up with legendary workhorse Bret Hart failed to deliver anything of interest. His first title reign ended seconds after it began due to an atrocious bit of booking at Wrestlemania 9 that led to Hulk Hogan being challenged by Yokozuna just after Yoko had won the title and then being pinned by Hogan after a clothesline and a legdrop making him look weak and stupid all at once. He got to win the belt back from Hogan at King Of The Ring in June 1993 and got to hold the title right up to Wrestlemania 10 in 1994 during which time WWE really lost the plot and had him feud with the useless Lex Luger and the hopeless Jim Duggan as if Yoko wasn't struggling enough to begin with. At Wrestlemania 10 they put the belt back on Bret Hart and once again, tried to pretend the whole thing never happened.