that'd interest me as well..
KuCoin and Poloniex seem to be somewhat trustworthier but they can demand KYC at any time. Poloniex has low volume though.
Poloniex stole and dumped my coins at AYL and sent the funds to my states treasury when I refused to agree with their TOS after Goldman ballsacks bought them so yeah no.
Have no clue about Kucoin.