Howdy Welder, I take it you might mean a saddle (the thing the strings set on) as opposed to bridge (the thing the saddle sits on). My personal favorite is typically bone. I just simply prefer the tone. With that said, I can’t say it is best. It is just a matter of personal preference. I have one that is micarta and I like it. I had one that came with fossil walrus ivory and I swapped it out for bone.
I have heard of guitars with Ebony saddles, and wood is used on saddles of other instruments (mandolins, violin family). I’d encourage you to try different materials. You might find something you really like.