Kind of impossible to determine who was best at the most basic combination in the sport LOL. Obviously a lot of outside fighters were proficient since they are both straight punches. Ali, Holmes, Louis are the popular heavyweight guys. A lot of European style fighters traditionally start their offense off of that combination and typically like fighting at range.
But I'm not comparing Holmes to Douglas, just mentioning them as two possible candidates for this thread.
Who was the most underrated then? I say Pryor, I think he threw more 1-2`s than any fighter in history and nearly all his punches were straight punches.
One recent guy that comes to mind that is somewhat forgotten is Mikkel Kessler. He worked really well behind his one two and is a guy that I call the prototypical European style fighter that used the 1-2 to set up everything.
As was his jab. I recently read the book Shavers wrote. He fought Holmes after Ali. He never even mentioned Ali's jab. He spent an entire paragraph on Larry's. He said it was so fast he couldn't see it coming, and was like a ramrod. He said it hit as hard as a right and hurt every time. I rate the Holmes 1-2 way up there due to his jab, and how quickly he could throw the straight right behind it.
He's way up there as well. If you take into consideration his combo of reach, power, technique, and hand speed, he might actually be top here. Lewis is a top 4 ATG in my book. Ali is #1. After that, kind of a toss up between Louis, Lewis, Holmes for me.
Lenox was pretty good with it. Roger Mayweather was notorious with it - double jab and BANG huge right-hand down the pike. Thomas Hearns Mark Breland Alexis Arguello
That indeed was awful for any challenger against him. Carlos Monzon liked to counter with a left right to the body and head.