Haki does not = Retsu, Retsu is simply the massive power of a soul reaper overwhelming a weaker sould, Like amamoto did to Nanao, even so Admirals can block or rival that with haki, but as far as being able to actualy hit them, no they can't. So no starkk does not pwn as he never even pwned anyone,
As for Kurohige's argument, I loled at you here, you know he was exaggerating, I'm guessing you didn't get it when he said "In all seriousness" at the end. Still Kizaru can fire a crap load or his paw blast:
If you want to count them go ahead not that it matters as he can make as much as he wants.
As for air opponents Mihawk's slash would be able to get them:
Mihawk's slash was able to reach whitebeard who was on the mobey dick ship and go even higher I'm sure if he simply aimed upward he would hit them.
Aokiji would be able to hit them too, look at the massive tsunamis Whitebeard created which towered over all of mainford, that alone would get oponents in mid air, but Aokiji manages to jump to the very top of them and freez them instantly so he would have no problem with them either:
And now we have Whitebeard who uses his earthquake in the air destroying Aokiji whom later reforms (Note as shown when he hit Akainu whitebeard has haki) Whitebeard would be able to destroy everyone in the air.
Also note that Aokiji can fly too, and whitebeard blew away his projectiles which would instantly freez him, not that it matters as Aokiji froze him with absolute zero and he broke out of it with shockwaves.
As for Kuma his speed rivals the captains:
as for the 1,000 paw thing:
That is how fast and strong it is, it goes straight through the body as it also attacks internaly.
Attacking eternaly and fast
He can also react fast enough to Zoro's thirty six pound canon as his pw paw fruit allows him to reflect any attack at light-speed.:
He explains it right here, no one in bleach could tank such a shot or dodge such speed.
Now as for the paw thing he shoots out 100 not 1,000 still it would be enough:
He also can tank a hit from Zoro and Sanji (Note this Kuma is much stronger than the PX units)
Also note how he blew that rock away
And finaly his giant shock wave:
Big enough to cover the island.
From across the ocean too.
Note he also has lasers he can fire as much as he wants, made from Kizaru's energy:
And even steel is melted. (Note Zoro took a hit from that.
His paw fruit reflects ANYTHING this includes pain and fatigue ect which Zoro tanks, still I'm not sure the captains can:
With all that said team One Piece stomp.