Maybe an All City Space Horse is worth a look? Seems to tick most of your boxes. Did you have a preference of rim vs disc brakes?
Definitely disc. Had a look at the All City Space Horse GRX - out of my price range. And not too keen on the color :P
Oops, missed the part of your list that specified discs! All City do a Tiagra version but it's still not cheap for the spec. I have a (second hand) Mr Pink and think it's great though, All City make really nice frames.
@MitzEclipse started
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Maybe an All City Space Horse is worth a look? Seems to tick most of your boxes. Did you have a preference of rim vs disc brakes?