Mirrorless instead of DSLR... I'm using a Fuji GFX 50R on a Toyo VX23D digital view camera. It gives me the full range of movements that I've grown to love from my 4x5 days. The Cambo Actus GFX looks great too, but it costs waaay more and is less flexible.
I had to build a custom mount to get the Fuji onto the VX23D camera. Any decent machinist can build this mount relatively inexpensively. It's just a flat piece of aluminum with a piece of a Fotodiox GFX adapter mounted.
Depending on which lenses you want to use, you may have to do some custom machining on the lens side. Some lenses can go right onto Toyo 110mm x 100mm boards, e.g., that's how I'm using a Schneider Apo-Digitar 80/4, which is stellar on this setup; it's on a 12mm recessed Toyo board. My 125mm lens goes on a standard flat Toyo board. I've just added a longer lens (180mm), and it needed an extension ("top hat") board. You can actually mount longer lenses in the 150-180mm range on reversed 24mm Toyo recessed boards, but I bought a 25mm custom extension board from Hong Kong for $85 (a total bargain).
Shorter focal length lenses bring special problems. Lots of excellent lenses (like the modern Rodenstock digital lenses) simply won't mount due to flange focal length and mechanical constraints. Some don't have a useful image circle (e.g., the Schneider Apo-Digitar 60/4 will fit on a 24mm recessed Toyo board, but has a measly image circle that barely covers my Fuji GFX sensor). I'm getting good results with a wide angle 60mm enlarger lens in a special mount I've had to fabricate.
Wider than 60mm requires retrofocus lenses, or messing around with lens correction in software (which I don't want to do). Retrofocus lenses are usually no problem -- lots of choices there. I'm using an SMC Pentax-A 645 35mm f/3.5 as my wide angle lens. I had to fabricate a custom mount for it but am happy with the results, and get a decent amount of shift (around 10mm).
Bottom-line OP: you can have what you want!