What’s dishonest? Kochou was a strong Zhao Great General who’s misunderstanding of Kanki’s guerilla tactics proved fatal. But Kochou himself was undoubtedly Zhao’s strongest military figure outside of Shibashou and Riboku.
Does Houken really count since he is not an actual Great General?
Ko Chou was a strong Great General, you're right about that, even though it's somehow still debated in the fandom (go figure), but the element of dishonesty I was hinting at lies in the convenient omission of critical facts and truths around much of the discourse on Eikyuu, Ko Chou and Kan Ki, and willful ignorance regarding their impact.
To be clear, I regard Kan Ki's victory of Ko Chou as the single best feat of generalship thus far (though, contrary to popular belief, there are other contenders), however it has been my experience that much of the fandom simply refuses to acknowledge Hara very clear set up Ko Chou to run a race against time he was destined to lose
by virtue of the narrative choice to have the Hi Shin Army arrive half a day
early. Just in time to save Ou Hon. Just in time to salvage in the pincer. Just in time for Ko Chou to make that fatal mistake to divert troops before he could figure out Kan Ki's plan.
There's a reason why Hara drew Ko Chou and Ou Sen recalling the Su Bin strategy at the same time. It was a) to highlight Ko Chou's quality as a military commander one last time, and b) to illustrate just how fearsome a figure Kan Ki was to have used it under those circumstances.
Eikyuu was Kan Ki's victory. Indisputably. He threw down the gauntlet as the commanding general and took Ko Chou's head. Yes, it required the cost of some 80,000 troops. Yes, it nearly cost Qin a future 6GG talent and powerful army in Ou Hon and the Gyoku Hou. Yes, Kan Ki's willingness and choices reflected his depravity as much as his talents - but it worked. At the cost of 80,000 men, Kan Ki took in excess of a 100,000 Zhao troops, eliminated their then highest ranking and second best (to their knowledge?) general, and, most critically, ended the year long attrition leading to Bujou and Heiyou.
All of this is true.
But it's also true it wasn't all down to Kan Ki, despite what the discourse is overwhelmingly likely to tell you. I think it's a shame people refuse to acknowledge what Ko Chou was up against. His army essentially fought against three: the Kan Ki Army (comprised of three smaller armies and a handful of units, the Gyoku Hou Army and the Hi Shin Army. Kan Ki, Ou Hon, Shin, Kyou Kai and Ka Ryo Ten all against Ko Chou and Duke Gaku Haku? That's not even counting the likes Rai Do, Zenou, Kan Jou, A Ka Kin, Kyou Rei and Na Ki on the Qin side.
Three 6GG armies led by five 6GG tier talents with talent and firepower to spare. Sure, Ko Chou had the numbers, but come on
I don't know what you meant by that last sentence so I can't address it.