I am confidently suggesting Binance of course, the most used and the current largest cryptocurrency exchange in the world. This is not only a suggestion but a recommendation. Based on my own experience, after my account got verified on them (Personal Information, Government-issued ID, and Facial Recognition), until now, I have never encountered any hassles with regard to the KYC.
My account also on other exchanges has been already verified like in Kucoin and Coinbase but I don't use them often, unlike in Binance which is already enough for me.