I'm surprised you pulled up "Timothy" from The Buoys. Not many would remember that one either. Same year I think - 1972. The song (about cannibalism) was written and sung by Rupert Holmes, who would have a string of hits nearly a decade later with the biggest one being "Escape (The Pina Colada Song)"
Hundreds of other great songs from that era, now mostly forgotten about.
Yes, he was a very imaginative song writer. I believe the story was that he wrote the song on a bet; he told someone he could write a hit song about anything, and that person bet him he couldn't write a song about cannibalism. He did, and it became a hit song.
Someone else mentioned Brandy (Looking Glass), which is definitely a song I identify with summertime.
Also Sausalito Summernight by Diesel, Moonlight Feels Right (Starbuck), and Afternoon Delight (the Starland Vocal Band).