Which tow vehicle would you choose?

I don't own any of these. I am using a Nissan Frontier now after using a Ford Escape initially. I would say that the F-150 would be a good choice since these have the Ecoboost (turbocharged) engines. The advantage is that they do not lose power as one goes up in elevation. This is like the Escape's Ecoboost engine. When we were operating at 6,000 ft, we still had power where the current Frontier loses 4%/1000 ft of elevation. The difference becomes obvious so if you will be operating in mountainous terrain, the Ford would be a good choice.

The Jeep Grand Cherokee is one where I would recommend you go for the Diesel engine if you can. It will be a much better choice for towing. I don't know about the 4-Runner. If it is turbocharged, it might be a good choice. The best thing is to go to the manufacturer's web sites and search for the towing specifications. That will be helpful as you decide which will best meet your needs.

Maybe it's common sense...

I have a 2014 Grand Cherokee Laredo 4x4 with the base V6, pulls just fine, has the tow package, new they cost in the low $30s. I use a Tekonsha P3 brake contoller & Fastway E2 weight/sway hitch. Trailer is a 179.

We got the Frontier after we had an accident in December involving ice and wind. I had always steered away from trucks because I thought my wife would not like one. The funny thing is, after we got the Frontier, she said that she didn't object to them. Had I known that, I might have gotten one earlier. One other factor was mileage. Since we don't tow all the time, I wanted something that would be fuel-efficient for the times we are not towing. The Escape met that need. However, the Frontier is more versatile since we can use the bed to store things we don't want inside such as gasoline for the generator and a spare propane tank. We have a hard tonneau cover over the bed, so it stays dry.

If you are considering a pick up, I would suggest that you also consider a large SUV.  We use a Ford Expedition EL and it has the same frame, engine, transmission, etc as the Ford F150 in most cases.  A chevy Suburban/Tahoe or GMC yukon is similar.  These vehicles have great advantages in enclosed storage and additional seating over pick ups.  We love our Expedition and would recommend it to anyone towing a tt.
Vann