Even if you pay for every legal anime streaming service available to English speaking audiences, you won't get everything.
As such, I don't think I can say names, but free sites aren't as bad as they're made out to be. Watch what you can legally if you'd like, but just remember that even if you're paying around $40-$50 a month for a load of streaming services, you won't get everything.
A fantastic way to give back to the industry is to buy blurays, so doing that is an option as well if you so choose to ever get into free sites.
I only offer this up as a very viable option, simply because it is a very viable option, and one that should be greatly considered rather than being locked out of seeing certain series because of dumb licensing fees.