I mentioned it because it's not confirmed.
As far as where I am going to stand....
I'd put them below Freeza probably (not exactly gonna lose sleep over it). Only canon feat (of sorts) there is that I remember it was based on was the humans' BP progression rate. Idk what info there ever was on Krillin's training with 18 or any other comments in the manga.
Some people say Toriyama stating Krillin>Tenshinhan means Krillin>Kikoho vs 2FCell but most likely he just meant Krillin without Kienzan>Tenshinhan without Tribeam-ha(!) or Krillin with Kienzan>Tenshinhan with Kikoho, since obv otherwise Krillin would've done more against the androids or if it was referring to the EoZ or Buu Saga still Krillin would have had some more relevance I'd imagine, like Piccolo. Although it's AT so could've meant anything lol. But yeh obv can discard that crap.
Non-canon possibly Imperfect Cell vs Krillin (can't remember) and then also Tenshinhan vs Future Trunks in movie 9.
Could be a new canon one....Goku/Vegeta choosing Krillin over Goten and Trunks for the tournament. Krillin>SSJ Trunks? Lol. Or did that never even happen? Skipped through most eps of Super.