Now that is good to know, something interesting for me to try one day. I assume you must measuring seat-tube center to center there?
18" Airborne (c-t actual seat-tube, c-c 15.25") virtual top-tube 22.99" so extremely close. I'm 1.73m but with monkey long arms which
I need to find some space to put somewhere. Getting longer stems to sort out reach is rarely the good answer, especially as I like to keep
to a 5 degree bar sweep for wrist comfort. As for in-line vs lay back posts, it really depends a lot what your favorite saddle was intended for.
If I was to go custom for a general purpose all day lively rider something like a 71 degree head-angle long-ish top-tube into a slacker 72
degree seat-tube with something like a 42.25" wheelbase and a touch lower bottom bracket around 11.5". An extra inch slapped on
the top of the head-tube height compared to retro, something like 5.5". For 26" wheels. Obviously.
Tried 19 or 20" Kona's, though they have slacker 74° seatube than you want, they fit the other dimensions, either side of your wheel base, correct headtube angle (to be honest that's standard, some race bikes went steeper by half a degree)
I ride with inline and forward from centre.
20" headtube are 150mm
5' 10" ish in cycle shoes.
Comfy bikes.
I would say Rockies too, but they are hard to describe.
Seat and Head angles, length changed as sizes changed.
AND
They changed between models too, depending on their target riding.
AND if it had an in line post, they slackened the seat angle a bit.
So the lower models with lay backs would have steeper seat tubes.
And some had STT Short Top Tubes withing that model, so a 18" came in two different effective top tube length.
So just because you like a Hammer or an Altitude doesn't mean you'd like a Blizzard or Stratos or Fusion..
So couldn't recommend one to try.