>>698355Yuyushiki, Gochiusa, Mitsuboshi Colors and Yuru Camp pretty much have no drama and I rate them pretty highly. There's also Machikado Mazoku airing right now if you want something to watch while it's still airing.
Also it depends how wholesome they have to be because some fun ones like Mahoujin Guruguru 2017 have slight pervy elements but are always done in a silly way.
I'm pretty sure all of them have made me feel happier at least, and with some like Yuyushiki and Gochiusa I've gone through them at least 3 times and it's still enjoyable.