I know Greed doesn’t just greedy for money and riches but also food and over eating. But with his appearance and appetite you think he would be Gluttony. Even the sin was Gluttony was disgusted on how he eats.
I think Bee might have her standards. I mean, she mentioned in her debut episode that she thrives off of the positive energy that gluttony has on the people around her, so not all examples of the vice are to her liking. Especially when the individual in question is as toxic as Mammon.