If you can think of someone who excels in their field and is superior to all others, you can say that someone is “in a different league” or “head and shoulders above the rest”. The second expression, in particular, creates a vivid and immediately comprehensible image.
People “in a different league” may even attract the media's attention. If this happens, they can be said to be “in the public eye” or “in the limelight.”
But there is, of course, no guarantee that such media attention will last. While it is often essential to specialise, it’s usually not a good idea to “put all your eggs in one basket”, meaning to commit all your energy to one speciality area. This expression is so versatile that it can be applied to many areas of life.
Ultimately, there may be a “sweet spot” – a balance – to be found by specialising in certain areas but ensuring these specialisms are sufficiently different. By doing so, you can indeed “have the best of both worlds” and enjoy the advantages of both approaches.