Hi there!
I can recommend Kloof Medi-clinic. Its just off the Rigel offramp. I had both my babies there and really loved it. Only downside for me is that they dont have private rooms. All rooms are double. But with my last baby I was in the room alone, which was great. My gynae is dr Laker, female gynae. She is great and will answer anything you want to know. She will also never just say all is ok, she tends to rather go towards being overly careful and always takes baby's wellbeing first. I had natural birth but I think she is more of a c-sec gynae. But she never once mentioned c-sec after I told her I want to go natural, which is great since that shows she respects the way you want your birth. She is just very full so go see her now so that you can get in with her, but once your preggie they will fit you in.
Also Kloof has a great babyclinic where you go for weighing and vaccinations.
The other hospital that I can recommend is Pta east, opposite Woodhill estate. Great hospital and there are some amazing gynaes there, I just cant give you any first hand info.
Good luck!