K-On! is pretty safe. mostly just a wholesome slice-of-life to vibe to.

i'm pondering wether i should argue for Re:Zero on the list or nah. it does feature some very bad relationships caused by the protagonist, but it isn't pictured as anything positive.. actually it's pretty debatable in some scenes involving the character Rem, or the very last episode of season 1.

i'd rather keep my distance from No Game No Life though