"Top of the chart" is a common phrase used to describe something that is at the very peak of success or popularity. However, there are many other ways to convey this same idea using different words or phrases. Some examples of synonyms for "top of the chart" include "number one", "first place", "top-ranked", "bestselling", "highest-rated", "most-watched", and "top tier". These words and phrases all capture the essence of being at the pinnacle of success or achievement, and can be used interchangeably with "top of the chart" in a variety of contexts. Whether you're talking about music, movies, books, or anything else, there are plenty of ways to express the idea of being #1.