BTC will always be the top choice for long term buy and hold. After that, both ETH and LTC should be good for long term also.
I kinda agree with bitcoin would be the first reliable choice in long term investment. Hodling with bitcoin never give you an anxious feeling because you belive of its potential that will always grow. I think Ethereum and Litecoin is the same as bitcoin. We can use these three coins for hodling.