It's virtually impossible to top this years class: the 2 longest reigning WWE Champions *I think* in Backlund and Sammartino, the greatest Diva ever in Trish, a former 5 time WCW Champion, 1 time WHC, King of the Ring, commentator and now GM - Booker T, The Hardcore Legend, and who helped the WWF beat WCW in Mick Foley, and Donald Trump.
The top 10 realistic contenders though for me:
Paul Bearer *Him, Undertaker and Kane inducted separately at some point, then together at another*
New Age Outlaws *Together with DX at another point*
Triple H (Headliner)