I highly recommend Biz Atom
Biz Atom was recommended by friends who used their services to open their company and sponsored EPs. Christopher is very reactive and explained very well the whole process to me. He had a very honest assessment of my chance of success for an EP application. He turned out to be right as althought lengthy (due to the current backlog and admin process in Singapore) the process was successful. I highly recommend discussing with BizAtom for your plan to open a company, sponsored an EP, or other services associated with independant business.