You're forgetting that Stark also needed Wonderweiss as a distraction to get a hit on Kyoraku.... So does Stark look weaker because he needed Kyoraku's best friend getting killed as a distraction to get a hit on Kyoraku? No it doesn't because all is fair in war.
Shunsui was waiting for Stark to use his strongest move to use Bankai..... He knew Stark was hiding it (And called him out for it) and wanted to save his Bankai for the wolves which were released later.... But due to circumstances he didn't even need to use his Bankai.
I am not saying that Shunsui is stronger than Zaraki because he probably isn't but you're looking at the Stark vs Shunsui fight in the wrong perspective..... It was implied right from the beginning that they were shown as beings of equal strength in which Stark even acknowledged that Shunsui was very strong. Throughout the fight Shunsui just didn't feel the need to use Bankai, if Stark had released the wolves on Shunsui 1v1 then we would have seen Bankai..... And Shunsui would have still probably won. So my take is that Shunsui wouldn't fodderize Zaraki nor Zaraki fodderize Shunsui but it will be a battle fought hard by Kenpachi.... Shunsui wouldn't make it easy for him. But you never know Shunsui's shikai is OP and thinking about Bankai it may turn things in Shunsui's favour so we actually don't know..... But as of now I reckon Kenpachi would win if Shikai vs Shikai
But I do think that Kyoraku and Ukitake would be considered as one SWP because their combined power was said to surpass all before and after them which was said by Yama. And Kubo has done very well at keeping their teamwork a secret and even in the databooks the Shunsui and Ukitake vs Yama fight was considered a draw while other fights that didn't finish were definite losses or wins.
Ur forgetting kyoraku was already getting help from another strong captain in ukitake witch try were still struggling to get a hit on starkk..without ukitake help shikai kyoraku would have been hit by a cero soner or later...an wat you talking bout everything is fair in war? We are saying who's stronger between zaraki an kyoraku if kyoraku needs other to be involve so he can hit his opponent then it shows you that kyoraku is not as strong as you think he is cuz other people aren't part of kyoraku's power.
Lol no he won't waiting for the wolves exactly he was just waitng for starkk to use a more dangerous attack plus starkk cero guns are better for opponents like kyoraku cuz it keeps him from ever getting close sense most his shikai attacks are close range attacks...the moment stark used his machine gun cero kyoraku knew he had no choice but to use bankai cuz he told ukitake he was about to use it.
I'm just saying shikai kyoraku had no chance at beating starkk while a shikai patched zaraki beat someone with a stronger arsonal than starkk an like I said before zaraki did not even use his shikai speacial ability...an yes I also feel that if kyoraku used bankai he would have beat starkk..kyoraku shikai is not op for current zaraki not even a little bit coming close range is wat zaraki wants his opponent to do..also zaraki would not use shikai for a shikai like kyoraku's that pact no super destructive power.
Of course they are not swp they are not thaat speacial if Yama not one then they won't be one..yea that fight was a draw I guess sense they were all standing once it came back to them but was Yama really serious in that fight? If it would have dragged on I don't think they would be able to keep up with Yama an would have eventually lost do to stamina reasons.