https://safedice.com
https://www.crypto-games.net
https://betking.io
https://www.bitdice.me/
https://satoshidice.com
https://www.moneypot.com/
Correct me if I'm wrong but I believe SD has the highest EV out of those. This means that your payout is bigger, but the the optimal for an investor is also that number of bets are huge. SD is also not only a Dice game but also a slot game that gives a more steady payout to investors. AAnother drawback of the site is that it already has 5000+ BTC invested, so you'd have to invest quite a bit in order to get a big share of the bankroll.