Great work on those images. How about using the monopoly banker? Something similar to the following:

using the monopoly symbol guy would not be good for legal reasons tbh
i would suggest an iconic looking bank or perhaps a fat pig with a top hat or something that represents 'banks'
the swear finger dude meme thing tho... not good
if i get bored ill make something up.. its good that people are at least throwing out ideas tho