Question

What other moves like hone drill have a one hit KO

Answer 1

Sheer Cold, Fissure, Horn Drill, and Guillotine are moves when hit cause a one-hit-knock-out(OHKO).
The attacker must be a higher level than the target and will likely miss as it has 30 accuracy.
People usually use moves like Lock-On and Miracle Eye then the move to garuntee a hit.

They arent worth it to be honest.

Answer 2

sheer cold, fissure, horn drill, guillotine

http://www.serebii.net/games/onehitko.shtml

edit: they all have 30% accuracy