Is it possible to make leaving a PhD look good on a CV / Resume?
In my discipline (computer science), almost all of the people I know who declined to finish the Ph.D kept it listed on their professional profiles with a "not complete" note under it.

They did list their experience though under "work experience", as "Research assistant" or similar and continue to keep their accomplishments listed.

Overall, I think keeping it there, even if unfinished, is better than having a long gap of 2-3 years, because big gaps of nothing are going to look worse than employment in that period that you decided (for varying reasons) to not complete. You can explain away "I decided not to do a Ph.D" in a phone screen but it's harder to tell someone "Well, I actually tried to get a Ph.D but didn't finish, sorry I didn't list it on my resume".