Most cancer patients need a team of oncologists, rather than just one. In most cases, you'll need a surgical oncologist, a medical oncologist, and a radiation oncologist at the very least, and even with them on your side you'll need various nurses, practitioners, and other professionals to help.
Cancer is no longer a death sentence, because medical science continues to advance at a rapid pace. A good oncologist -- or a team of several -- can help you navigate your way though the obstacle course of treatment and recovery, so don't give up. You don't have to.