As others have said, few jobs are inherently graceful by any definition of the word. It is what the individual brings to the job that gives it grace, or lack of grace. If you mean which careers have the most earning potential, you've already answered your own question- banks, derivative sales, etc. If you mean which careers can perhaps be most compatible with ideas of social justice and dealing honestly and sensitively with others, then you might say enivrobusiness, sustainability, credit unions and coops for deprived communities, just to name a few examples. But a person can bring grace and decency to any job.
Can you explain more fully what you mean by "graceful"? I suspect that others will also be unsure what you mean by this term. Please provide some synonyms so that we can give you the most helpful responses possible.