Prime XBT (https://primeXBT.com) requires no verification apart from email to set up an account.  It's due to launch by the end of this month (January 2019).  It is an advanced trading platform that offers margin trading with up to 100X leverage, short selling and a variety of order types, which include: stop-loss, limit orders, market orders, one-cancels-the-other (OCO), etc.

From what I can tell it looks to be of a really high quality. Could be a serious contender for Bitmex...

The trading terminal also provides aggregated liquidity from 12 top exchanges for instant order execution promising the best price. I'm definitely keen to check it out once it goes live.  As an introductory offer the first month is free of any trade or commission fees also + no doubt they'll be running other referral and special offers alongside the launch. 

(Listing and available for trade is: bitcoin, ethereum, ripple, eos and bitcoin cash).