I'm a big fan of Suzuki Sidekicks and The Vitara models but there are lots of others.
Here is a
LINK to the past umpty ump years of the models of vehicles towable four down without major changes.
The lighter the better as far as I am concerned but I've towed a Suzuki Grand Vitara and don't know it's back there for the most part.
Good luck with the search.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson
David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
Roadmaster 5000
BrakeBuddy Classic II