EOS
XRP
XLM
XYO
SNT
DENT
DOV

That's too many altcoins to choose from and only a few of them I'm very familiar with. I won't be that person who diversifies a lot.
It's not just I think that's the best option for me to do. Around 2 or 3 altcoins are already good and I'll include the only XLM on this list.