For shounen anime, I'd suggest HXH (Hunter X Hunter). I'd also suggest Naruto since Madara is one of my favourite characters and villains in animes. Mind you, one but not the most . Naruto was good in the beginning and middle, but got dumped down in the Fourth Shinobi War arc since many characters just received power-ups, it had horrible OSTs and many plot holes. HXH is pretty good since it has a lot of character development, a plot which revolves around different enemies and it clearly explains the powers present in it's world as Nen is a form of life energy. My favourite arc has to be the Chimera Ant arc as it really managed to portrayed the grim situation and had some of the best moments such as Netero's death and Neferpitou's annihilation to oblivion by Gon. Katekyo Hitman Reborn is also decent.
I don't watch other genres of animes much, but from the clips that I've seen, JoJo's Bizarre Adventure seems pretty good and so does Tokyo Ghoul. (though I don't like supernatural stuff at all ;0)