Goku's at his best when he's in legit struggling fights, is being hilariously smug, or being there or showing his care for his family. It's why the Pan SoL episode with Goku babysitting her was great. But yeah, generally Goku's pretty meh in SoL episodes. He has his moments though. Like his tractor joke with Mr. Satan, him wearing the turtle suit against Kuririn, and him wearing his slicked out greased hair in the Arale episode. He was also pretty funny in the Baseball episode. He, Beerus, Champa, Vegeta, and especially Yamcha made that episode. Goku's slow ball was hilarious. But Yamcha's joke about leaving Tenshinhan and Chaouzu behind is still the funniest shit of that episode.