My list of every mountain in SA with at least 1000m topographic prominence is also posted on this site - see the following link:
The list is more or less in order of prominence. The Western Cape top 10 and SA top 10 are almost identical, just with Cockscomb or Mannetjiesberg depending on which one was looking for.
I’ve been working through this list for a while, although my progress has slowed a lot recently after initially getting through the first half of the list rather quickly. I just need six more, all of which are in the Western Cape. Tierberg, Pilaarkop, Groot-Winterhoek, Keeromsberg, Grootberg and Misty Point to go. I also need to tag the high point around 30km from Pilaarkop, which some maps show as higher than Pilaarkop and thus would replace Pilaarkop on the list if it is higher. Not that I need an excuse to go and climb an extra mountain!