Beethoven looked grumpy, or about to sneeze, not severe; and Liszt had a long face and big nose like this and he was decidedly scary.
I'd recognise the Hagen bust as Beethoven, the shape of the face is right, even if it does make him a bit romantic and good-looking. But it doesn't look anything like the glass ones.
We might have to agree to disagree.
I wouldn't have the glass thing, because I am very fond of Beethoven.