I recommend:
Sword Art Online(game,romance,action) 1/2 season
Gakkou Gurashi! (zombie,school life)
Fairy Tail (action,comedy)
Aoharu x Kikanjuu (shooter,action,comedy,school life)
Prison School (comedy,school life)
Jitsu wa Watashi wa (school life,comedy)
Monster Musume no Iru Nichijou...