Gohans half saiyan, 17 and 18 use infinite energy cybernetics for their combat power - none are comparable to Krillin.

Tien though, totally. Toriyama has come out and said Krillin is the strongest human (I believe), so he either forgot about Tien or were just supposed to understand that Krillin is stronger than him despite Tien being far more dedicated to training and facing down bigger threats.