I have check several sites like Bitvest, Stake, Duelbits, Sicodice, Crypto games, and Bustadice, unfortunately the house edge of these sites is 1%. Crypto games was used to be 0.8% and they also have 0.4% house edge promotion for VIP members, but I'm not sure how about now.

Probably new casinos offer lower than 1%, but the risk is on you.