P2p exchanges are the safest, that is because you are not going to give the exchange your personal data, and while trading the exchange isn't going to act as a third party, you and your trading partner would control the funds in a multi-sig wallet, that is what p2p should be, not peer to exchange, then exchange to peer. For p2p exchages: https://kycnot.me/.

If you want centralized exchanges, take note that you will have to provide personal documents to pass their kyc protocol, and if you want to trade, the exchange is going to be a third party in the trade