What's wrong with Kraken? I was thinking about opening an account there for margin trading.
Huobi was one of the big 3 Chinese exchanges before the government forced them out. It looks like they allow unverified accounts to withdraw ~ $1,000 equivalent per day. They don't allow US residents on their main exchange (Huobi Global) but a VPN might do.
I'm pretty sure Okex requires KYC now, and they don't allow US traders.
Full KYC and dozens (if not hundreds) less coins. No access to anything resembling securities. I hope it doesn't look like Binance Jersey, their UK/EU offering that only lists a few coins. It might.
I hope their main site goes easy on VPN usage.