This list is fun to read but likely VERY inaccurate.
Ultimate Warrior was very strong. He once said he never went too heavy in anything for fear of injury, though. In the later '80s, I arrived at my gym shortly after he'd left, and my buds told me he was behind-the-neck pressing 275 like it was en empty bar.
Hulk Hogan would be crushed under 550 pounds, regardless of when this lift supposedly took place.
I watched Warlord press 455 for six PERFECT reps with no spot. He paused each rep on his chest with no compression. Total freak. Simply massive. His workout that day (that evening he was to wrestle in Toronto): squat: 315 for endless reps, 455 bench (as stated) and then 365 incline; again, like it was nothing. Oh, and he was super friendly and kind (gave me some spots on my dumbell presses and was very encouraging), despite looking like a scary behemoth.
I bench pressed with Brett Hitman Hart and he was using 225, and it wasn't super easy for him, either.
Arcidi was wearing an early version of a single-ply shirt when he hit his seven, I believe.
Kazmaier is more than likely the strongest presser of any of 'em. He hit six with 600 raw and he likely would have pressed 700 or more had he not torn his pec.
Doesn't matter who you are, a five bench isn't "easy", ever. Unless you're, like, Eric Spotto or some shit.