I don't think Raikage's speed would be too much of a factor. He's shown he has amazing speed and he's easily faster than both but at the same time he's not very clever when it comes to strategy and sacrificed his arm while fighting Sasuke. He also would have likely died if he had done his leg drop move onto Sasuke's Amaterasu.
So on that note Orochimaru wouldn't struggle too much against his speed because of how easily he can maneuver around other people's techniques. He is like a snake after all and I think Raikage would have real trouble connecting with him, in fact I can imagine he'd be a real nightmare for someone like A who prefers to attack head on.
Jiraiya himself is the real beast here, easily better than any of the Kage in a 1v1.
"His strength was so great that even powerful members of Akatsuki either were easily subdued like Konan while others like Itachi Uchiha and Kisame Hoshigaki, a master of the Sharingan and former member of the Seven Mist Swordsmen respectively, opted not to face him in battle, fearing that the very best they could do together against Jiraiya would end in a stalemate. Kisame even noted that he was no match for Jiraiya saying he was "on a whole other level." Itachi stated that even if they had reinforcements, the result would be no different. Minato Namikazealso acknowledged his master's power, skills, and mindset. Even Nagato, a former student of his, was nearly defeated despite outnumbering Jiraiya, causing the younger opponent to marvel Jiraiya's abilities, noting that he could have been beaten by Jiraiya had he had prior knowledge of his "secret" From Naruto wiki. Yes I know it's very lazy of me lol but I can confirm that all the above is true and have provided scans in other threads as proof. I simply cba to re-write all that text.
Plus that Itachi and Kisame statement was made before his Sage mode was even revealed. Now we all know Itachi is easily Kage+ level and someone like Kisame is easily at low Kage level/Kage level. That surely shows how great Jiraiya is. Plus he has what is in my opinion, possibly the best genjutsu shown so far. It's certainly far easier to use than Izanami and unlike Izanami it doesn't cost the user one of their eyes and it's a guaranteed kill, working against someone who even has the Rinnegan.
Orochimaru has been stated, by Sasuke himself on at least two occasions, to have been more powerful than himself. This is the same Sasuke that barged right into the Kage summit without a care and took on all the Kages in a 4v1. He fought evenly against A and even Gaara and the Mizukage were unable to contain him. Only the Tsuchikage was able to take out a tired and battered Sasuke.
"Being one of the Sannin, as well as a former member of the S-rank criminal organisation Akatsuki, Orochimaru is an extraordinarily powerful ninja, being Kage-level in his own right. He was also considered as a child prodigy that appeared only once a generation. His skills were so great that during the time of his invasion in Konoha, the Third Hokage feared no one in the village would be able to defeat him or even fight on equal footing with him, even himself, and that Orochimaru was supposedly strong enough to take down a small nation all by himself. Even Kakashi, one of Konoha's greatest shinobi, was filled with tremendous fear when he met him during the Chūnin Exams, and himself admitted that he wouldn't even stand a chance against his power. Sasuke Uchiha also stated that his victory over Orochimaru was only because the latter was already severely weakened prior to their confrontation." Again from Naruto wiki. And again all true and I can confirm this.
Also you have to remember that even in his old age Hiruzen was said to have been the most powerful of the 5 kage.
But obviously team Kage have the numbers on their side, but imo I think Jiraiya and Orochimaru have a slight edge on their side.