Small truck to tow 4 down

I tried very hard to find a small truck to tow. I think every one that can be towed has been mentioned and I checked out every one of them. I wanted a 4 door crew cab, I wanted an automatic transmission and I wanted one comfortable to drive. None of the small ones were a fit for everything I wanted. I finally settled on a Chevy 1500 Silverado. Has everything I wanted except is bigger and a little heavier that I wanted. I towed a Jeep Liberty for 12 years and the 1500 is about 1000 lbs more. I had to compromise on something and it turned out to be the size. Don't know it is behind me and I love the truck.

I towed a 4 cy Toyota P/Up 4 sp for thousands of miles with no problems

2009 Nissan Frontier, 4-cyl, 2WD, 5-spped. Very much the nicest of the "small" trucks built in that year. Tacoma, Frontier, Ranger, Colorado. Tight, carlike ride, no squeaks/rattles, interior looks deluxe even in our XE base model.
That said, only Ranger was the "mini-truck" in the bunch. All the others had already gone "mid-size." I went into this wanting a Ranger, but the option combinations and uncomfortable ride drove me off. Lots of ways I think Ranger is the best toad of that bunch. It's easily the lightest, and is very maneuverable. Tight turn circle. And VERY VERY Cold Air Conditioning.
EDIT - Looked a your Profile - You can tow anything you want with that big DP, but I'll mention the SportTrack would be the heaviest of the bunch. They're a very popular toad, full four-door cab and a short but decent truck bed. Check carefully on the towing since some model years may call for a dealer-installed "neutral kit" for the electronic transfer case.

2010 Ford Ranger, manual tranny.

We also tow a Chevy Colorado 4 door 4x4 pickup. (2008)

ALL GM models, since around 2002/2003 are towable 4 down even with an electronic transfer case. Some of the earlier models were, but you will need to verify any of the earlier models.

NO Ford is towable 4 down without modification, until the 2012 model F-150. That includes the Ranger and the Sport Trac.

Dodge is towable 4 down.

The above is for any 4x4 truck with an automatic transmission. a 2wd model may be towable 4 down with a MANUAL transmission, but not with an automatic, unless you do some expensive mods.

I tow a chevy Colorado 4x4 and love it. push the buttons for neutral and tow with no restrictions. Mine is a crew cab, with a tonneau cover I use for a storage area when on the road.