DoF scales on lenses is pretty much of thing of the past (see: Why did manufacturers stop including DOF scales on lenses?), mostly due to the fact that zoom lenses and autofocus are ubiquitous and commonly used. A DoF scale changes with focal length, and autofocus has made the focus "throw" of a lens much much smaller than in manual focus days, so using a DoF scale with any precision with manual focus is problematic. And, well, you've got autofocus, which tends to be pretty accurate. And DoF preview buttons can help you estimate what the DoF is, as well as possibly a DoF scale in the viewfinder.

These days, manual focus aids include liveview features, like focus peaking and magnification. Not DoF scale focusing and split-circle focus screens.

I don't think you're going to find another dSLR that has exactly what you're envisioning. What you need to focus on is what is your budget for this dSLR, what kind of performance do you want? And what format of sensor will deliver for you?

If you want a dSLR or other interchangeable-lens body that's similar in feel-in-the-hands to your AE-1, chances are good you'll have to go with a mirrorless body. dSLRs are much larger than their manual film counterparts, because of features like autofocus and autoexposure. For a similar-sized body, something like a Fujifilm XT model might work, or the Olympus E-M series. And chances are good you could use your lenses with an adapter on these mounts.

But if you want something that feels and operates, menu-like, like your old Canon, than a Canon dSLR might be better, but you'd have to swap to EOS-mount lenses. OTOH, unlike Olympus or Fujifilm digital cameras, you also have the choice of a full-frame sensor, which is a sensor that's the same size as a frame of 35mm film, so things like DoF and FoV vs. focal length, and the view in the viewfinder will be more similar to what you're used to with a film SLR.

See also:

• What do I need to consider to choose between dSLR, mirrorless, or a compact as my first "serious" camera?
• When do the differences between APS-C and full frame sensors matter, and why?