Please point to all the "far left" people on this list. As a matter of fact, point to all the far right people on this list.
en.wikipedia.org
It's mostly celebrities and sports, besides Obama, who is number one by virture of being a widely-admired President, and Musk, who's number two and just told everyone to vote Republican.
Maybe by "loudest" you mean those that tweet the most, but I have no stats for that.
Of course, I doubt you really have any idea what you mean, other than lamely trying to confirm the pre-concevied notions you haven't put much time or thought into in the first place.