Bitcoin and Ethereum are indeed the best long term investment. They'll grow regardless of other coins. Waves is gaining momentum and market share gradually. It is also a good long term bet. In October the Waves' price will be pumped due to their release. Wings again has the best development team. They too have news next month, but major release is next year.

You should diversify your portfolio with all these coins. They all are best for long term investment. You really did a good research.