I would like to start with One Punch Man, but unfortunately Netflix has taken it down.
Coincidence or did you wait extra until the series was taken down by Netflix after ages? ^^
You can watch both seasons for a fee on Anime on Demand.
Legal only on Anime on Demand, but with costs.
You won't get any illegal tips here
Anime on Demand.
You can't name illegal sites
But legally only on anime on demand
Anime on Demand (2 season) and Crunchyroll (1 season)