Tomb of Ahmad Shah al Wali: This is often considered the most impressive. Its interior is famous for its stunning frescoes/paintings and elaborate calligraphy (though they are unfortunately in a poor state of preservation today).
Tomb of Humayun Shah: This one is a striking, almost macabre sight, as its large dome and two walls were famously shattered by a lightning strike, leaving it as an architectural cross-section.
Grandeur & Decoration: The tombs of Ahmad Shah I and his son Alauddin Shah II are particularly noted for their size and detailed craftsmanship, including stucco work, inscribed Quranic verses, and remnants of tilework.