re: I could be wrong but Myles is the best QB to speak.

It’s really hard to top Burrow in this regard. Burrow rarely, if ever, uttered ‘uh’ or “you know” in his press dealings.
Brennan is articulate enough, but no more so than most senior quarterbacks, but needs to reduce his “you knows”.
None of that matters when he’s out on the field. How does he command the huddle, recognize defenses/coverage, feel the pocket pressure, and deliver the ball. That’s it.
He can speak pig Latin as long as he can perform at QB.