The Fountainhead is a great book, one of my favorites. Atlas Shrugged is also a very good book in a slightly different way (but it overstays its welcome). I love Ayn Rand as a writer, she was bold, energetic, smart. She could weave a fictional alternate reality like nobody else, while keeping the human characters at the very center of everything.
The problem is that for some reason she couldn’t keep it at the fictional level and started thinking maybe the fiction was a good model of reality. That kinda taints a bit the legacy, in my opinion.