Towed mostly with 150 and 180 cubs, Robin DR 400-180, Rallye MS 893 180, Pawnee, and a bit on Wilga and Yak 12 (looks like a Cub on steroids).
Pawnee and the Yak are the easiest IMHO to fly for tugging. The Yak and the Wilga both guzzle petrol, 260 hp radial engine (sounds nice, though)
Been towed by all the above, plus Supermunk, 235 rallye, 172, tiger moth.
Which is best depends on what's on the other end of the rope!