My recent favorite of Bach is Concerto for Violin and Oboe (the only concerto for this combination). Here's the gorgeous second movement of it:
Haydn is called "Papa Haydn"-- he invented symphony and string quartet and so he is a father of those genres. But what I found at Haydnhaus in Vienna was that he was called Papa Haydn during his lifetime, by everyone; his servants, orchestra musicians and even his pet parrot. He had a great sense of humor and open mind, he was surely loved by everyone around him.
Here is a good example of Haydn's sense of humor: "Farewell" symphony. Enjoy how musicians leave the stage one by one. This was written to ask the Esterházy for a time off for orchestra members.