Don't know what to watch

Today I just finished watching 86 and it was an absolute masterpiece that has left me feeling empty. I want to find something else to watch that is absolute peak, I've watched some peak anime like FMAB, AOT, death note, Vineland, code geass, monster and am looking for something with a deep plot and amazing ending, I want to find something that has already been completed, does anyone have any suggestions?