Coons is not "generic". He's actually very outspoken, and seems to be a leader amongst his colleagues in the Senate. He tends to not throw out partisan bombs on the talk shows, but that doesn't make him generic.
Coons is "Generic" in the sense that he is a party-line Democrat on the issues, belonging neither to the very moderate wing (i.e. Manchin, Sinema) or the very progressive wing (i.e. Sanders, Warren), but in between them, like most of his colleagues. He's also very much in line with the party establishment, as you allude to in your post.
