khabib is outstanding, but just like rocky Marciano his undefeated record isnt questionable, its just not enough. they both left the game too early to be considered goat. Joe Louis held the heavyweight title for 10+ consecutive years while Rocky Marciano whole career start to finish was only 8 years. Jon Jones and Anderson Silva both held their respective titles for 7+ years while Khabib only held the title for 2-3 years.