No parades at Thanksgiving. The only parades are during December (Macy's parade) and Mardi Gras.
USF:
Curious George and the man in the yellow hat: Kid Zone and sometimes near Terminator.
Woody Woodpecker---KidZone
Spongebob--by Lucy tribute also by front gate
Jimmy Neutron--by Jimmy Neutron ride, Lucy Tribute, and front gate
The Rugrats---Lucy tribute and front gate
Dora--front gate and by Lucy
The Flinstones--in front of Shwab's pharmacy
Scooby Doo & Shaggy---KidZone
Shrek, Fiona and Donkey---between Shek theater and Monster Cafe
Doc Brown--numerous places
Marylin Monroe---By Lucy tribute and sometimes by Shwab
Lucy and Ricky---same as Marilyn
Barney---by Barney show
Fievel---Fievel's playgound in KidZone
Mummy stilt characters---in front of Mummy
Popeye and Olive Oyl--near Shwabs or Lucy tribute
Madagascar characters--in the plaza as you exit Central Park, sometimes at front gate
IOA:
Spider-Man--across from Spiderman ride and in Alterniverse store across the street from Spiderman store
Captain America---across the street from Spiderman store
Popeye & Olive Oyl--ToonTown
Merlin--Lost Continent near Dueling dragons
Cat in the Hat--Suess Landing
Thing 1 & Thing 2--Suess landing
The Grinch--Suess landing
Other assorted Suess characters--Suess Landing
Sinbad characters and the Beetlejuice characters after their shows.
You won't have problems seeing characters as they are everywhere. Marvel Super Hero Parade is almost hourly. The other characters are out multiple times a day.