TL;DR: "Best" job is a dynamic flow, your job or your priorities will change, better to just start.

It depends on your definition of "best": do you mean the job that you think you will enjoy the most? The job that you are the most knowledgeable on? The job that you will have the most upward mobility in terms of opportunity for promotions and salary increases?

All of them at once, i suppose, but you cant have everything at once: my advice would be just start somewhere. Thinking you're going to get your dream job fresh out of college is a bad way to look at the world. The best job may be the best right now, but your priorities will change in life.

The best job today may not be the best tomorrow for a variety of reasons, but if you start somewhere, you will always have the experience generated by your existing occupation to carry you forward and propel you into your next big position.