Other mirrorless (assuming here simply larger than 1" sensor) with built in view finders:
basic optical finders: Fuji X10, Canon G1X
More advanced optical VF: Fuji X20, X100, X100s, XPro 1
Rangefinders: Leica M8, 8.2, 9, ME, M240
Electronic viewfinders: Panasonic GX7, G6, 5, 3, 2, 1 and 10. GH 1, 2 and 3. Olympus OMD. Sony NEX 6 and 7. I think there's a Samsung model with a viewfinder. Nikon J1, J2, J3. Fuji XE1. I'm sure I'm missing some.
EVF with SLT: Sony's SLT line (a33, 35, 55, 58, 77, 99 or something like that. I don't know that line too well).
If you ONLY mean optical, than you are correct. The issue is simple: there are only a few ways to do an optical viewfinder:
1) a parallel viewfinder, but the closer you get to the subject the worse the parallax error. This can be ignored (X10) or you can use framelines (XPro 1). Also, if your camera is using anything OTHER than a fixed prime lens, you also have to figure out zooming/different focal lengths.
2) view through the lens, which auto-corrects for parallax and focal length, but then you have to have a mirror in the path, and then you have a DSLR.
An EVF helps solve this, as long as the EVF can read the image to the screen and then take the shot and return the image back to the viewer ASAP. So, most mirrorless makers are going EVF. Two possible issues with EVF: it's hard sometimes to get the color and contrast just right (but then again, with an EVF you can better simulate the expected exposure), you can't see anything the sensor can't see. That is, with the X100, XPro 1 and Rangefinders, you can see objects coming towards but not yet into the frame. I suppose you could do this with an EVF in the future, but my guess is sensors are still pretty expensive, and companies aren't yet willing to "waste" sensor space to give you an edge outside the frame. Also, EVFs will eat batteries more than an OVF.
There are TONS of upsides to EVF (see exposure simulation is one of the biggest. See in B&W or other filter/art settings is another).