-There's a reason why many other legends name Flair as either the GOAT, or their personal favorite.
-There's a reason why Flair was NWA Champion for most of the 1980's essentially, and held all those titles.
-There's a reason why Flair won the top belt in pretty much every promotion that he ever worked for, including NWA, WCW, and WWF.
-There's a reason why even during his final WWE run, when he was obviously well past his prime ME years, they still booked him in fairly prominent positions in the show (Evolution/his alliance with Triple H being the obvious one of course), and he was used to put over younger up and comers (because his status spoke for itself, so there was still some rub to be had by beating him).
-Etc.
Flair was the total package in terms of what a "pro wrestler" needs to be, plus he was a big draw for many years as well.