I remember talks about Khabib few years back how he went from the bottom of top 10 to top 5 without fighting (he wasn't fighting for two years or something because of injuries). I've seen here something like that too recently, like if I'm not mistaken Nate Diaz, Magomedsharipov and Ortega are moving up in UFC rankings without fighting (I think only Magomedsharipov is White out of 3 of them and he black haired and with brown eyes).It’s not necessarily about the champions. It’s about who they push. PVZ and Sage come to mind immediately as fighters who got unusually strong pushes.
Oh and these talks here that at BW both Aldo and Yan didn't deserved a shot at the title. And from what I understand both of them are of mixed race origin.
Or look at latest UFC star -- Chimaev, with dark hair and dark eyes.