In my head, I know that Randy Savage is the only one who merits a Hall of Fame induction, based solely on his career. However, I am going to play devil's advocate for a second, and make a case in favor of Lanny Poffo.
I disagree adamantly that Lanny Poffo did absolutely nothing during his career. He actually had a very good career with the WWE, certainly better than that of Koko B. Ware. There was a time when "Leapin" Lanny Poffo was one of the most over guys on the roster. He wasn't near Hulk Hogan's level, but for a while, fans loved to hear the poems he would write on frisbees where he would taunt the heel opponent he would be facing. He was also a high flyer before high flyers were cool. His heel turn swapped the object of the poems, but this was a guy who got legit pops and legit heat after becoming the Genius for reciting POETRY. He also did it without many people knowing that he was Randy's brother. Who really knew that Randy Savage was actually Randy Poffo? I know as a kid, I had no clue. The fact that he was Savage's brother was not public knowledge, and his character never capitalized on that.
He is also one of the few men who can claim that he got a victory over Hulk Hogan during Hogan's title reign. Yes, it was a countout victory, and yes it involved Mr. Perfect interfering and hitting Hogan with the belt...but the fact that Hogan actually allowed Poffo to get the W, something that was rare, cheating or not is remarkable. Hogan normally didn't lose, even when cheating was involved.
Then there is the obvious:
Lanny Poffo got paid in full by WCW for 4 years of sitting on his butt at home. I don't care who you are, who your brother is, the fact that you were able to get paid to do absolutely nothing for 4 years is impressive. Fuck, I wish my boss would send me home for 4 years and still pay me my salary, that would be awesome! If you can convince your boss to pay you for 4 years to do absolutely zilch, that's HOF worthy right there.