Depends where you are and what you’re selling. If you’re selling a house between the commons, I highly rate Rampton Baseley and Thorogood’s. I find the Lavender Hill and St. John’s Road agents over price to win the business and end up having to reduce asking prices eg Dexters/winkworth etc.
RB, Thorogood, Savill’s and Hamptons price realistically, I find. KFH are also on the high side. I also didn’t have a great experience with James Pendleton when we were renting short during a renovation. I would rate them in with the Dexters/Winkworths of this world.