Most are the most utilized altcoins beyond ETH (now and in the coming years)

In anticipation of altcoin season I am beginning to do my research. I'm interested in learning about the real world usecases for various alts and which ones have the most significant deals or uses in place. I am looking for things like SOL and Visa; foundational partnerships with major players in business and traditional finance that have the potential to drive widespread popular adoption and create significant utility. Who do you think has the most current or potential value beyond price speculation?