Your selections are good, that is also in my direction but not as many as yours, if you need to add more then do research on the first set of coins on coinmarketcap but I really do not like holding too many coin, so as to be able to follow updates about them, also to know when to even add more or sell.
Sometimes buying too many coins is not a good choice, but everyone has their own way and strategy in investing. But for myself I agree with you that I don't like investing in lots of coins and prefer to focus on a few coins that I think have the potential to generate profits according to what I observe.
There are so many coins put in the market and it is never recommended to invest into every coin that appears amazing to one because these are simple marketing techniques to grab the attention of investors. The best way to invest into coins is to choose the ones that have proven results and secondly do great research before making investment. Dont simply invest because majority is investing.