You can guess all you want, but the fact is Gane was winning the fight until Francis had to try wrestling. Gane dominated and finished Lewis striking, Lewis defeated Ngannou in a decision striking.
Since we're doing hypotheticals, I believe had JDS, Stipe, Cain all been healthy and in their primes, they all would've beaten Ngannou.
That's the most blatant use of moving the goalposts I ever saw! Lol
Another hypothetical, if Jan was properly acclimated against Pereira and didn't completely gas after round 1, he would've continued to maul Periera just like round 1, and like he did against Izzy. So Maybe Alex shouldn't be on your top 5 list.
Because of wrestling
He KOd and dominated Lewis in the standup, a guy who won a standup fight against Ngannou
Ngannou has really only beaten washed relics, and Blaydes in the standup. Both their resumes are lacking.