It all depend on what you mean by the best because all the p2p exchange have there own unique features but in terms of best market price I believe Binance is the best and in terms of secure trading platform Remitano have that. Those are the p2p exchange I like the most but localcoinswap is not included in your list.
I have added localcoinswap, I checked about it, and I see it to be decentralized, have you used the exchange before? Or you know some Nigerians that are using the exchange? Decentralized exchanges are just the best for p2p trading with privacy not compromised.
I have used it once before, I think 2 years ago but I went there to sild their native token which I got working for them during their bounty and the token was wonderful so is their service. However, I don't know how their service now.