How about one of planets where Vasquez Rocks exists?
The Rocks were used in the following episodes/movies. From
Ex Astris Scientia:
1. Amusement Park Planet in TOS: "Shore Leave" (where Kirk gets beaten up by Finnegan)
2. Metron Asteroid in TOS: "Arena" (that the Metrons have set up for Kirk to fight against the Gorn)
3. Lazarus' Planet in TOS: "The Alternative Factor" (site of the rift between the universes) ...in the Omicron Delta system
4. Capella IV in TOS: "Friday's Child" (where Kirk, Spock, McCoy and the pregnant woman seek refuge)
5. Vulcan in "Star Trek IV" (the peak to which Spock retreats to meditate)
6. Mintaka III in TNG: "Who Watches the Watchers" (site of the "duck blind")
7. Tarok in VOY: "Initiations" (Kazon training ground)
8. Xyrillian homeworld in ENT: "Unexpected" (holo-simulation)
#1, (in the Omicron Delta system) is an Amusment Park planet so that's out.
#2 (at an unknown desert planet) [may have been temporarily created by the Metrons] &
3 (uninhabited planet near Starbase 200) were never officially named but may be good candidates.
#4 is Capella IV inhabited with Cappellan's, and #8 the Xyrillian homeworld so I think those are out. Although, 8 could work...
#5 & #7 are obviously eliminated.
#6 Could be a very interesting selection given a Proto Vulcan race exists there but issues of contamination could also rule it out.
Unless they decide to create a new world for them then #3, (my favorite) work best imo.