On total medals, I think we can pretty much count on 3 more from the Cycling (between Finucane/Caldwell, Men's Keirin, Men's Madison, Women's Omnium), plus the two Athletics relays. That's 62.
Think it's fair to project that between the two Modern Pentathlon women, two Taekwondo fighters, Muir, and Artistic Swimming, we might get another two. That's 64.
Anything beyond that (Emily Campbell, McNeice, Noah Williams, Burgin, or additional medals from the cyclists/pentathletes/Taekwondo fighters) would be a nice bonus, and take us past Tokyo.