Alex is awesome but he's nowhere close.
If he can beat Ankalaev, Boner, Tom, Pavlovic, DDP, Ulberg, Jan, Gane, Blaydes, Khamzat and Strickland, it would help.
I don't think it would put him in the top 3 but it would be getting him closer to the conversation. If he beat all those fighters, his list still wouldnt' look better than Bones or GSP on paper.
He would also need to beat fighters that aren't stars, yet, which would mean he would have to enter his prime at about 45 years old.
No matter how much you like a fighter, GOAT means better than any other fighter that has ever done it.
The lengths they have to go to get there are almost astronomical.