hmm actually maybe business banking may have more opportunities in terms of banks to work for i think. Consumer banking is only limited to the local banks and a few key foreign banks like hsbc/scb/citi/maybank/cimb and to a lesser extent boc.

Business banking and corporate banking on the other hand includes many offshore branches who handle subsidiaries of their MNCs etc. Apart from all the banks mentioned above you also have the 3 big japanese banks; SMBC, BTMU, Mizuho who each employ ~700 staff, then you also have a wide spread of middle eastern banks, korean banks, european banks etc all doing mainly corporate banking and investment banking etc.