I think my S-Class Hazou would be The Inventor (though with a better title than that, like The Builder). High Sealing, High Technique Hacking, and has mastered every element. Research is his undeniable area of true expertise, and he spends hours every day planning and pushing the limits of what can be done with chakra. He invents custom techniques for his teammates and let's them use it more effectively, including a Hidden Mist with an artificially greater density of water while still being a gas for Noburi, and Akane's Flame Shroud. The one Jutsu he loves and uses most often is still MEW, and the precision and complexity of his walls can turn a primitive village into a fortified castle with irrigation and canals. His Sealing expertise lies in the humble storage seal, and is still working on Ambulance seals that keep a living body in stasis, and Hammerspace seals that can turn a bag into a Bag of Holding. Maybe he still holds the Poor Man moniker, and mimics famous abilities through his seacraft and ninjutsu. He still had his devastating Taijutsu that can outfox the most cunning of foes, but he rarely engages directly anymore. The rest of the group, including Inoue, now fully accept him as their leader, and he has blossomed into that role. He opposes Pein and his Akatsuki at every turn, and seeks every strategy to cut them off.
As for S-Class Kagome, well, what could he be except the Watchman? He is Chief of Security, refusing to let anyone hurt his family and offering dire consequences to anyone who tries. He is an Elite Sealmaster, being much more focused on the field than Hazou, and has finally broken out of his explosives rut. Anywhere he visits becomes safer by an order of magnitude. Like Hazou, he does not customarily engage directly, but equips the rest of the team with insane firepower and utility seals. Socially, he is greatly rehabilitated, actually able to socially engage with his family on an equal footing, and keeping cool under pressure. While he is still constantly on the lookout and plotting escape contingencies, he is now able conceal that fact under a nice face and spring into action the moment before it's too late.
Well, we have a full team now. Sure is great that I get inspiration now, instead of earlier.