[link] probably the best website for cameras and camera gear out there.
I'm just going to go out there and straight up recommend a specific camera for you. it's a "beginner" level DSLR but it's really nice. there pretty much aren't any bad DSLR cameras anymore if you are buying from nikon or canon.
1. You can get better control over depth of field with fast telephoto lens, 50-85mm f/1.4-2.0 is the best choice for portraits. 2. Wide angle lens have higher distortion level, so human faces would look deformed if you do a closeup. 4. Image quality on modern DSLR's depends on lens you're using in the first place.
So I would recommend to buy cheap DSLR and 2-3 primes for your needs. (50-105mm f/1.4-2.0 for portraits, 20-35mm f/1.4-2.8 for everything, and maybe 14 Samyang/Bower/Rokinon for ultra-wide shots or 90/100mm macro lens)
1. More control over depth of field - this is dependent on your lenses f-range. The lower the number (for example, 1.8) the smaller the area of focus (so blurry foregrounds, backgrounds, etc.). Most kit lenses are going to have around the 4.5-18 ish range. (Not 100% sure on that top number, because I never shoot that high, it could be higher.)
2. Wide angle - again, dependent on your lens. Most kit lenses won't be wide angle.
3. All DSLR's are going to have a wide range of shutter speed and aperature (and aperture is dependent on the lens).
4. Megapixels are besides the point. You're not going to find a DSLR with a low image quality.
Just look for a basic starter DSLR. Don't go spending 1500$ on a new camera when you could spend $400-700 on a starter that will suit your needs perfectly. Plus, if you want to get some of the things you're looking for (I'm going to assume low aperature and wide angle), you'll have to buy lenses that do those things. You can find some really cheap lenses that are good for their price, (Like 50mm f/1.8 which runs about $120), so if you have something extra you could always invest in one of those.
2. Most kit lenses are wide angle. In film photography a lens with focal length between 35 and 24mm is considered a wide-angle, less than 24mm is ultra wide-angle. So 18-55mm lens is wide for a digital camera with ASP-C sensor.(18*1.6=28,8mm)