ETH, Monero, Siacoin, IOTA, Golem, ripple are some of the well known coins which have a practical use. PERL coin came up with a good practice, the coin became opacity coin. What are the remaining alt-coins which have practical usage?
I think that from the list of coins that you have, the first 4 coins that you listed are the coins that I am familiar with and I don’t know about the last 2 altcoins that you mentioned but I will need to do some research myself to see if those altcoins are worth my investing, but since you have mentioned those 4 coins in your post, I think that you have an idea of what an ideal investment is.
If we are to also expand the list further, I think that most of the altcoins that are still within the top 20 coins are the coins that I can believe to have the real use working case which is why we could see that they usually respond to the bull run off bitcoin at any time it makes any no matter how little it may be, so I would pick more of my investment coins from there.