I would concider anything made by Maeda a Masterpiece, so if we take my personal top 5 animes made in the past years(in term of quality, not personal preferences), it would be not in that order:
1- Stein;Gates
2-Angel Beats
3-Clannad(even though I hated the last few minutes)The kind of miracle that made everybody survive
4-Monster
5-The Melancholy of Haruhi Suzumiya
Honorable mention: Jojo's bizarre Adventure would be in that list, it's a close fight between this and Haruhi. And Charlotte will probably be a Masterpiece, once again, like everything Maeda did.
Edit: honorable mention to School days as the Character development of the protagonist was probably the best ever made and deserve at least a mention as a masterpiece for thatThe MC really nice and naive at the beginning everyone want to cheer for him as he tries to get the girl, and develop into being the worst piece of shit to ever exist(in animes, there's worst IRL ) that you're actually happy he dies
1- Stein;Gates
2-Angel Beats
3-Clannad(even though I hated the last few minutes)The kind of miracle that made everybody survive
4-Monster
5-The Melancholy of Haruhi Suzumiya
Honorable mention: Jojo's bizarre Adventure would be in that list, it's a close fight between this and Haruhi. And Charlotte will probably be a Masterpiece, once again, like everything Maeda did.
Edit: honorable mention to School days as the Character development of the protagonist was probably the best ever made and deserve at least a mention as a masterpiece for thatThe MC really nice and naive at the beginning everyone want to cheer for him as he tries to get the girl, and develop into being the worst piece of shit to ever exist(in animes, there's worst IRL ) that you're actually happy he dies