My '17 F150 ecoboost in Lariat trim has an 1800 lb payload. I have max tow, as well as airbags.
There are many small fivers around but some have high pin weights:
Grand Design 29rs which is what I have. UVW 8515 lbs, pin weight 1498 lbs
Grand Design has a new 230rl 1/2 ton towable, UVW is 6895 lbs, hitch is 1195 lbs,
Northwood Manufacturing Fox Mountain 235rls UVW 5860 lbs, pin weight 1375 lbs
Jayco Eagle HT 24.5ckts UVW is 7400lbs, pin is 1285 lbs
Rockwood 2440WS UVW is 6741 lbs, pin is 1134 lbs
Keystone Cougar XLite 25res UVW is 7035 lbs, pin is 1405 lbs
Cougar XLite 26rls is very similar as is 27rks.
Also look at the Cougar Half tons, 268rlswe, 279rkswe, 264rlswe