Lily58 or Solfe. If you want the Corne experience, just remove switches.
Consider something that allows you to do both Choc and MX unless you already have a strong preference. LilyPro can do this.
The extra column also allows for the pinky mod, which is my favorite Miryoku layout (moves the top pinky column outward). Pikachoc has this natively.
Fartality