Hi OhItsThtGuy. Welcome to Geekhack.
I think that both the terms "build" and "quality" are up for interpretation. What sort of features do you want? Anything TKL is not a common niche for people who want something DIY. My favorite all time OEM TKL is the Corsair K65, and people seem to love hating on that whole family of boards, so I'll leave OEM boards out of it.
Since the Heavy Metal Keyboards GB is over with (being the only one I have noticed that tempted me enough to pull the proverbial trigger), there are things like the
XD87, which has always been pretty cheap. It looks like
somebody ported QMK to it, if that's important.
What sort of features are desirable?