Most of the people suggested for litecoin, I will say the same. After bitcion and ethereum give priority to ltc. Though I prefer ltc more than eth. You may also select Polkadot as your 3rd choice. DOT was one of the successful new altcoin of last yearr. And now it's doing further better. Chainlink(Link) is a good option too. But I don't have any idea about the other one you mentioned.
litecoin known as silver if bitcoin is a gold, and i agree with you if litecoin should be in the third place
but, if the waves on defi project coming back i think chainlink is the best choice to buy after litecoin