Here is a quick graphic list that I created with the current Top 10 Excha lists according to cryptocoincharts.info. They go by market share. Hope this list helps newbies out there.
I think this graphic is too old 
To me, top 10 are: Binance, Huobi, OkEx, Bitfinex, Bithump, Kraken, GDAX, Upbit, HitBTC and Bitstamp
Be very, very careful. HitBTC are known scammers and will 1 day be gone with your funds. There are endless cases against them. We are launching a Class action against them.
You can google 1000's of other people like myself that have been scammed. For example check this thread: https://bitcointalk.org/index.php?topic=2556342.0