How to bring my hair back to life? I need the best Leave-in conditioner!?

Hi! I have Semi-dry hair. My hair color is naturally black (Not colored) The top of my hair is normal but the bottom of my hair is dry And I use to have gorgeous, Smooth and silky hair. then I had swimming lessons. I have been searching for the best product. I really wanted to buy herbal essences but the shampoo has ammonium laureth sulfate which means its a very strong shampoo and I heard that it also have wax content. I already tried aussie , pantene and others but I need a mild shampoo which has Sodium laureth sulfate . And I guess I wanted to try bumble and bumble. so is bumble and bumble gentle shampoo and super rich conditioner any good? so I really want to try salon shampoos and conditioner because I know that they are the best. so tell me the best. please :) thank you! AND I NEED THE BEST LEAVE-IN CONDITIONER :) so any salon or drugstore good products do you know? :)