Are there any pokemon that can learn a one hit ko and a move that ensures a hit? If so, which one, and which moves?

Question

Self Explanitory

Answer 1

Articuno
Mind Reader
Sheer Cold

Answer 2

Articuno with Mind Reader and Sheer Cold.

Smeargle with Lock On/Mind Reader and Sheer Cold/Horn Drill/Guillotine/Fissure