Comparing sports betting and luck based gambling doesn't gives a clear picture.
For sports betting I like Sportsbet.io, Fairlay.com, directbet.eu and Nitrogensports.eu.
For gambling, primedice, betking, bitvest has its place and the new bubblesbit.com which is not even listed provides options like the old icedice site, a slide dice and has great customization for betting in a simple interface.
Basically you can ask OP to add any sites on the vote list, perhaps it will be added next month since today is the last day for this monthly best gambling site vote.