I'd say Kuririn and Tenshinhan shouldn't be far behind the Base Saiyans from feats such as Tenshinhan reacting to Gero's lasers as well as Goku did. Yamcha, however, is more of a questionable entry when he doesn't necessarily need to be anywhere near as strong as them. For what extended material such as the anime or the Super manga is worth, it presents Yamcha as not being vastly behind the other two, which is better than just assumptions. That said, I'd say Yamcha ought to solo here.