Which fighter past or present would you say was the greatest alpha male

[Wild Blue Yonda]

I guess we could call Hector Camacho the omega male, at the other end of the scale, LOL.

[Jay Volcano]

Muhammad Ali.

[Barn]

Marvin Halger and Thomas Hearns come to mind. 2 alpha males that straight up wouldn't back down from each other. Didn't back down from any other fighters either, always scrappy ready to fight anybody.

Hagler was a very good boxer and only fought like that(slugger) in his last few fights. Before that he displayed some excellent boxing skill.
Watch the Hamsho fights for some examples.

[Barn]

Hagler was the ultimate beta-male outside the ring he bytched about the first Autofermo fight. Famously got owned by Leonard at that banquet, and got owned by Leonard several other times

Hearns was definitely an alpha male

Anybody would have bytched in the Antufermo situation.