>>380000Digits don't lie.
I also think Risu's cover is the best, but there are some other interesting versions, like this one:
https://youtu.be/NYXDUGMOEoMThe thing that surprised me the most, when I was listening to original KING for the first time, is that Gumi's voice is pretty meh in this song. Literally half of the covers are better sounding than original.