Help! Please recommend a short TT 700c frame with ~38c clearance and disc brake! (Gravel/CX like)

Hi, I am thinking about building up a frame for longer bike tours (riding on smaller country roads, tarmac, gravel, woods etc.)

My problem is: I am quite tall (6'2"), with long legs and short arms, and additionally I had a back surgery some years ago so I really need to ride way more upright than normal people, i.e. I need a very short toptube and a very long headtube.
Because of my back, I realised that riding all day bike tours with 28c tyres or less is really not possible for me anymore, I need the cushioning of bigger tyres.
So I looked into the cyclocross category of frames and bikes, but for some reason all of these frames are rather long and low, not what I am looking for. Does anyone have an idea, a frame that would take 700x38 or larger tyres, ideally with disc brakes (but definitely with 1 1/8 steerer so I can have disc at front at least), and 27.2 seatpost dia (for my Syntace Moxey suspension seatpost), ideally steel, but could be alu, too - with a shorter toptube than usual?
Or, to be more exact, with short frame reach and high frame stack?

And, I also look for a very classic look without curvy tubes with varying diameters.

I am also considering designing my own frame (RattleCAD?), is Mielec still the place to go for affordable custom frames?

Thanks for your help!

Orlowski?

https://www.marinbikes.com/ww/bikes/four-corners-blue

This is what I imagine, any thoughts? Forks will be the Macho Man Disc from AllCity

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That stack 'n' reach is nuts. Have you looked at MTBs?

Genesis Vagabond?

fizzy: would you have that stack/reach combo in mtbs?? DH driven in the flatlands, or where?

That Genesis Vagabond goes into the right direction. Looks like the All City Gorilla Monsoon is a similar concept. Any more like this?

By the way, I think 370mm reach would be very common for people who need a short reach. It's just the 677mm stack that are a bit off. The Vagabond would have 608mm stack at this reach.

Not sure TBH. I'm not that familiar with MTB geo. I just had a very quick look and some Canyon ones have about a 3:2 ratio. You need quite a bit more!

I have a medium Vagabond, and if you buy a frameset and don't chop the steerer you would definitely be getting near to 670mm stack.
You could also consider something like to stooge moto handlebar to add some extra stack.

A risen stem and those 25mm rise Specialized bars? I know it won’t be the prettiest but if it works it works.

Or a recumumbent. Genuinely solves back issues and keeps you pedalling?

If you're planning to run flatbars then a frame designed for drops (i.e shorter) should get you closer to the reach you're after (than say an mtb that'll be longer and designed around flatbars).

Also, steep HT and 45mm fork offset ain't going to do you any favours in the toe overlap dept