The huge and most epic mod for minecraft is the add-on – Rediscovered. He collected all the best from other existing additions. You want to put just one mod and add everything you need and the most interesting to the game at once, then download this add-on.
A very large-scale mod that will improve the water situation and make it more realistic. This mod is designed to modify all the flaws of the Aquatic Update in Minecraft.
Modification will add to the game a lot of multidirectional blocks and objects that may come in handy during the game.