It's always sad to hear another stalwart comics talent has passed away. Jon D'Agostino is a name associated with many classic Charlton comics, especially My Little Margie, Atomic Mouse, Li'l Genius, Go-Go, Atom the Cat, Freddy and my personal fave of his Timmy the Timid Ghost.
Above is a gallery of some of D'Agostino's mighty Charlton covers. Here's a link to Mark Evanier's obituary on the longtime artist.
Oh and here's my favorite D'Agostino cover, a master bit of production work done in tandem with art from Ghostly Tales artist Rocke Mastroserio.