2. Naruto Uzumaki (No Boruto) - Naruto can spam attacks that dwarf the Hammer and has access to a lot of esoteric stuff on top of that. Might take a while but he'll do it.
3. Monkey D. Luffy - Luffy hits absurdly hard, Haki bypasses durability normally and Ryou is more advanced form of that. He can just shower Nolan with blows until he goes down. Also, Gear 5 breaks all the rules of durability to some extent so I am pretty sure Nolan will be hurt by him much worse than he would expect.
4. Ichigo Kurosaki (Final Getsuga Tensho version) - Dude obliterates small mountains by swinging in their general direction and is a million times faster than Nolan. Easy clap here.
5. Yusuke Urameshi - With the powerups he got from the Demon World Tournament arc, he blows away mountains with his energy attacks, punches people into the stratosphere with minimal effort and is much, much faster than Nolan. Might take a while but I think his damage output is high enough that he can kill Nolan before he gases out.
9. Gash Bell (Original Series) - Sidestepping the whole Kiyomaru casting angle; Gash shoves mountains around physically, wrestles with people who outmuscle black holes, critically wounds city-sized giants with his biggest attacks and has taken mountain erasing attacks to the face without dying. He's a lot faster and has a lot of energy to throw around. Nolan will be hurting but given that Gash can likely contest him in raw strength as well, this is a messy one.
12. Meliodas (Original Series) - Hits incredibly hard, especially with his endgame abilities that allow him to match The One in combat. Effortlessly quicker and has regen on top of that. I don't think Nolan can win here.
14. Negi Springfield (Original Series) - Hard to say. He's well faster than him even outside of Great Thunder In Heaven but his biggest hits cost him a fair amount of energy and he doesn't have a limitless supply. Tota Kanoe would have an easier time. I think Negi could likely take it, he's resourceful enough to manage his energy for an attrition battle.
17. Alita - See my previous comments about Viltrumite vulnerability to vibrations in their flight centre. That's technically not canon in the animated show yet but, if we consider it a strat, then Alita is almost tailor-made to debilitate Nolan.
18. Toriko (Pre-timeskip) - Way too fast, arguably a lot stronger, likely mauls him.
22. Vash the Stampede - Waaaay too fast again. The Angel Arm at max hits harder than the Hammer so that works. Or he can use black hole bullets which... should work?
25. Kenshiro - Much too fast and I can't imagine that Hokuto Shinken wouldn't work on Viltrumites as they're very close to human in terms of physiological structure. Phase fist, sever his nerves, take him to pieces.