Cell Saga Tien is debatable, but Buu Saga is another story. Tien trained for seven years during the time skip and defected buutenks's blast with his Tri Beam.
If you believe Beerus then Base Goku loses.
@flashback180: Depends on the size of the dinosaur. Something like a Velociraptor would be easy for anyone to cut with a Gantz sword. I will give Ryouta's bombs the benefit of the doubt though based on the info you provided.
Don't know about Ryouta, but as long as Kurono has his suit he has way higher durability then Takashi and the Gantz sword can cut dinosaurs in half with one swing.
@Kuma_From_Argentina: I don't know about that, if it wasn't for him they wouldn't have made it that far. You can tell he was really disappointed that they lost, so i'm sure he'll be training his ass off in anger that they didn't win.