But these dslr's in order (best to worse)? Edit?

Canon t6i
Canon t5i
Canon t6s
Canon 70d
Nikon d5500

They are all basically the same. The 70D is a class higher than the rest so expect it to have more features related to serious photography and the rest more features from a point-and-shoot camera.

When you listed the Canon 70D, you needed to include the Nikon D7200 because they are in the same class of cameras

On the link below, you can determine which of those cameras has the best performing sensor. Otherwise they are pretty much able to do all the same things. The differences in your images will NOT be because of the camera you pick, but the skills you have using the camera

70D, T6s, (T6i, D5500 equal 3rd), T5i

1) Pentax K-50 (cheaper than 2) or 3).
2) Nikon D7200 (competes directly with EOS 70D).
3) Canon EOS 70D
4) The rest.

It's the photographer - not the camera - that makes the picture, but I wouldn't expect anyone who can only see Canon and Nikon to know that.

What do you mean by the word "best"? I presume all these cameras will make a sharp16x20 print. But what is more important to me, is how comfortable is the viewfinder to use and the camera is to hold, Plus the location of the controls. That's why I left the Canon product and choose the Pentqx DSLR, simply because I can see through the camera easier. The conrtols and the styling make the Pentax more comfortqble to hold. When I can disregard these things, I can concentrate on making better images!

The Pentax K3-II or the Pentax K-S2 will blow the doors off anything on your list.