Minecraft has a long history of lucky blocks being implemented by the modding community. There has been so many of them that it's hard to pinpoint which one is truly the best.
If you don't know which lucky block to install, then try out the Super Furious mod that offers something extra on top of the typical lucky block drops.
It has an RNG element to it, which means that you can either get a lucky or an unlucky drop, and in total there are 256 variants. So try this as a lottery and who knows what you'll get next time.