Haru Invest is great!
I've been with Haru for over a year now and their site, app, and service have been consistent all throughout. Great rates and lots of investing options but I'm glad they only support Bitcoin, Ethereum, Tether USD, USD Coin, and XRP. They don't mess around with 100s of other coins and keep things simple. Their mobile is fantastic, very clean and easy to use. The service support has been great as well whenever I've had a question or a concern.