Another great C compiler with a single author - https://github.com/michaelforney/cproc
The one you link uses QBE as a backend whereas lacc has its own backend, a significant part of writing a compiler.
qbe is also from a single author, I suppose you could say cproc has 2 authors then.
FWIW QBE is also written by a single author. Both are great projects :)
I heartily encourage the idea of using hex numbers for comparison. It makes it just hard enough and will hopefully discourage the trend of looking at the numbers without reading the words.