"Chiaotzu was relevant at the 22nd Budokai" Bro literally lost to Kurilin via a math gag in the first round
Oob was wasted in GT, but he got better treatment than anyone else from DBZ aside from Gokuu and Vegeeta. He was equal to base Gokuu in his base form, which made him stronger than Vegeeta, Gohan, Goten, and Trunks even as SS1/2, and he was one of the few people to avoid being taken over by Baby. When he fused with Boo and became Super Oob, he surpassed SS3 Gokuu and SS Baby-Vegeeta. It's debatable how exactly he compares to Strongest Form 1 Baby-Vegeeta, but he made Strongest Form 2 use effort, so it's looking likely that he's stronger than Strongest Form 1.
Although he got turned into chocolate by his own technique, he was able to attack Giant Monkey Baby-Vegeeta from inside of his body, which saved SS4 Gokuu and gave him time to gather energy from the others. Oob did better than anyone who wasn't Goku in the Baby arc. It's only in the Super Seventeen arc that things really go off-rails for him, being surpassed by SS1 Gokuu and even SS1/2 Vegeeta. One could also make a case for Gohan, Goten, and Trunks matching or surpassing him, too; they both fared about as well as he did against Super Seventeen. Against Yi Xing Long, Oob's arm was broken by a single punch and he could no longer fight at all after a blast to the face. SS1/2 Gohan took a punch from Yi Xing Long straight to the gut but was well enough to remain transformed and give his power to Gokuu. We later see Gohan fight Super Yi Xing Long alongside Goten and Trunks in their base forms to give their dads time to fuse. While they all take beatings, they're still able to fight Super Yi Xing Long as SS1/2 alongside Vegeeta after it looks like Gokuu has died. Oob was still too hurt to help out, so he flew off with Pan, Veedel, Chichi, Bulma, Mr. Satan, etc.
One could say Yi Xing Long merely held back against Gohan, Goten, and Trunks but that doesn't really make sense; why would Yi Xing Long hold back against everyone else when the context was that he was trying to stop Gokuu from powering up and later fusing? But then again, if Gohan, Goten, and Trunks are stronger than Oob because they could take hits from Yi Xing Long and still keep fighting, that would suggest they're SS4 level which makes no sense. Honestly, GT's writing was terrible from the start, but post-Baby arc, it manages to get even worse. I don't recall Pan showing anything that would suggest she's at Oob's level, though.
