Does a fighter need a title to be in HOF?

Just wondering? Is this an unwritten rule? Winning a title is a great accomplishment but circumstance plays a role in getting one in my opinion. Who will be the first HOF fighter without a title? Phone Post

Ken-flo? Phone Post

No but it helps. Phone Post

If there is to be a HOFer without a belt, it should be Chris Lytle.

No. J-Lau Phone Post

And of course, Tank.

No.

no Phone Post

Great fighters should be celebrated and rewarded, regardless of winning a title. Phone Post