Specifically, "sure, I know you think that but you're wrong and I'm too polite to say it to your face right now."

That was my intended meaning, yes.

that sound is more of a eeehh or meeh depending on context. those two sounds verbally state "i disagree but dont feel like arguing"

“Eeeh” or “meh” would indeed signal mild disagreement, but it’s stronger.

I’d say there is a slight inflection to the “uh-huh”/“sure” (almost a low-tone questinging iflextion?) to indicate less-than-full-throated-agreement, but that’s difficult to convey in writing.

which are you saying is "more negative" eeeh or uh-huh? The way I hear it, eeeh is much more rude or insulting, but also has more levity. Uh-huh is a mild eye roll sarcasm meant as an insult, more to the side of someones back. Eeeehhh, is "pretty sure you are wrong" to their face.