Angel Beats!, Mirai Nikki Recommendations
They both share a similar characteristic of playing with your emotions, although Mirai Nikki has a much much stronger element of fear added in the mix. Both have strong plots and dark character backstories that become motives for their struggles. One could also argue that Mirai Nikki is a perversion of Angel Beats! since the participants are forced to fight each other to alleviate their live's sorrows instead of working together to overcome them.
Both fantastic comedies, made by the prolific Miyazaki-chan and his long time partner David Williams-dono. These two shows are both great to pick up your mood, especially after realizing Miyazaki, and David Williams did not work on these shows, but you can believe. Nothing wrong with these shows at all, if I have to say it, these shows are the best shows in the universe, quite possibly the world. 10/10
Personal tragedy, and overcoming or resolving it, seems to be the name of the game with these two anime. Angel beats more on how to overcome tragedy, Mirai Nikki more on how tragedy shapes us.