Luffy, Zoro, Roger, Whitebeard, Dragon, Sabo, Blackbeard, Shanks, Big Mom, Kaido, Rocks, Kid and Law will for definite have a higher bounty than Sanji. He's not going to be in the top ten. Being very generous, he might surpass the other subordinates with high bounties (Ray, Oden, Beckman, Shiryu etc) for being a main character, and Mihawk because Mihawk's a lone wolf.