That's like saying, "which car is the best on the market"?
However, there are only two epoxy resins: Bisphenol A and bispenol F. Bisphenol F is superior.
There are many curing agents (also called "hardeners"), but cycloaliphatics are probably the best curing agents.
If you go shopping for Bis-F epoxy, then you might as well look at a polyaspartic which is a different product, but may also suit your needs.