Waves' Vocal Bender is my current favorite. There are pitch and formant controls that let you dial in a more natural sound, though it's still not perfect and I have to actively filter pitch adjustment artifacts. I like it though.
https://www.waves.com/plugins/vocal-bender
Pitch shifting in Ableton.
Re: Pitch shifting in Ableton.
Ableton Live 12.1 added Auto Shift some months ago:
https://www.ableton.com/en/blog/live-12 ... blic-beta/
https://www.ableton.com/en/blog/side-brain-auto-shift/
https://www.ableton.com/en/blog/live-12 ... blic-beta/
https://www.ableton.com/en/blog/side-brain-auto-shift/
♥♥♥