Kakashi is one tragic character-
1) Lost his father to ritual suicide.
2) Thought he lost Obito only to find out he went all dark side.
3) Lost Rin because she sacrificed herself and took Kakashi's raikiri/chidori.
4) Lost Minato to the machinations of Obito(more like Black Zetsu though).
5) In a non-canon filler anime he lost the woman he fell in love with because was too dangerous of an enemy spy.