OP Of all the coins you mentioned here, Polygon is the coin with the most potential future like Ethereum. I picked Polygon as the first choice because Polygon is already an Ethereum-like platform. If it achieves something good in the future I think this Polygon platform will achieve it. Moreover, there is no hassle in transactions, transactions are completed instantly and transaction fees are very low.
I guess the reason why polygon is so ethereum alike is probably due to the fact that its literally just an L2 of ethereum in which utilizes same EVM with just different scaling technique but of course at the end of the day its just an L2 which sole purpose is to load off some of the transaction off the ethereum mainnet blockchain to polygon.
there are many people that thinks Polygon is some kind of L1 that just resembles ethereum well they might need to learn more about polygon but overall since the fact that they use their own coin for gas also could definitely make people think that way and that honestly totally okay.
but I think if its any coin that gonna be the next ethereum i will be frank its gonna be solana, their community so active, there are plenty of dapps and the coin price increase has been massive.