1. Python. Apollo killed the vicious dragon which lived in Delphi because Python had attempted to rape Leto while pregnant. I'm not sure if this is right seeing as Leto was Apollo's mother but its the closest i could find
2. Can't find
3. Sisyphus. Was chained in Tartarus by demand of Zeus. Sisyphus slyly asked Thanatos (Death) to show him how the chains worked and bound him instead. This caused the unthinkable: no human could die! ares got bored with war since no one would die and intervened, releasing Thanatos and sending Sisyphus to Tartarus. Before he died, he told his wife not to make sacrifices and then complaining to Persephone that he was being neglected, was allowed to return to the upper world to consult his wife. Once there, he refused to return, thus out smarting and cheating Death.
4. Chronos. Chronos (which means Time), was one of the first Gods. He and his mate Rhea gave birth to the next generation of gods but he devoured them as they were born. When Zeus was born, Rhea hid him and replaced him with a stone which Chronos devoured instead. When Zeus was grown, he was brough forth and killed his father, thus releasing all of his siblings as well.
5. Zephyrus (God of the West Wind) was fond of Hyacinthus, a youth that Apollo loved. Jealous that the young man prefered Apollo over him, he blew a discus off course and it struck Hyacinthus in the head and killed him.
Whewwww!! that took a long time! hope i'm right and hop it helps