Is this top 10 Generals from just Kingdom or from actual Chinese history? I’m not equipped to answer the ladder so I’ll address the former lol. And I’ll only do with the current manga.
So, just all time strongest is extremely tough to say because there are more factors that go into winning a battle than just the strength of a general. On top of the stuff you listed in the OP:
due to their tactics, instincts, martial might, experience, and leadership???
There are factors such as subordinates, morale raising, the state that they fight for, etc..all of these come together to make a General. So, based on all of these criteria, I guess I would say, in no particular order:
Riboku
-Goes without much explanation, Ouki describes him as “unprecedented” and Ren Pa called his defeat of Ouki “overwhelming” and referred to Riboku as “the most dangerous man in all China” among the current era of Generals, where several top tiers have claimed fame.
Haku Ki
-The Qin 6 are the strongest Generals in this manga basically, even other top tiers like the Zhao 3 and Gaku Ki were stated to be equal to them, and as the one who stood at the top of the Qin 6 as their leader, Haku Ki is a contender for GOAT status. I’m biased because I read up on some of this guys historical feats, but I think Hara will mostly stay true to him. And historically, this guy was a nightmare. Other states would gather entire armies against Qin, find out that Haku Ki was the Qin General sent against them, and would promptly surrender immediately. He had an undefeated record and was credited with the deaths of over a million people. Dude is a legend for sure.
Gaku Ki
-Another contender for GOAT status, he actually repelled a superstate Qi invasion with a Yan Army. That by itself is insane alongside other crazy feats lol. His hype also speaks for itself.
Kou En
-The only reason I put him so high is because he is an even stronger General than Kanmei who I will discuss more on below. I think he belongs in the same tier as the Qin 6 and Zhao 3.
Ren Pa/Ou Ki
-These two are basically equals, and I consider them to be the pinnacle of what a GG is capable of. They are simultaneously tactical masterminds as well as being top tier warriors. Lips Sama is a strategic mastermind who could not be fooled by even Riboku, as well as a giant-balled man-monster who thrashed Houken to near death. Renpa is a strategic mastermind, an Instinctual General, and a freaking mighty warrior in his own right.
Moubu (Kammei)
-I don’t take Shouheikun’s words on him lightly. “Moubu is Qin’s most terrifying General” and this was said with Ousen, Tou, and Kanki all active. Mouten also said his offensive strength is the greatest in Qin history, and 2 of the Qin 6 were heavily offensive Generals lol. In my opinion he is overall the strongest Qin General right now.
Ou Sen
-A tactical mind on the same level as Riboku. His Gyou campaign was the stuff of legend. There are Great Generals who probably couldn’t have accomplished such a feat.
Yo Tan Wa
-Semi-overlooked in our fandom, but she was already believed to be on the level of the Qin 6, and the mountain people consider her a “King among Kings.” Like Sei, she is a once in a millennium King who is basically the Sei of the Mountains lol.
Rin Shou Jou
-I don’t really have much to say about him other than that from observing Gyou Un and Chou Garyuu, his tactical insight was Godly and his subordinates were freaking insane. His charisma was also that of a great King, and he had strong ass dudes fighting under him and violently respecting him.
Duke Hyou
-And last but certainly not least, Duke Hyou is a hardcore sleeper. He could legit, depending on the circumstance, smash any General on this list with his Instincts. He is a wildcard who is really capable of anything on the battlefield, and I think he is probably a lot more legendary than we realize.
I don’t want to rank them in any particular order because that’s far too hard and subjective lol.