Complex sentence: He is best known as former guitarist and co-founder of the alternative rock band The Smashing Pumpkins and for his eclectic musical projects of recent years, most notably being a permanent fixture of A Perfect Circle.
Split into simpler sentences: He is best known as former guitarist and co-founder of the alternative rock band The Smashing Pumpkins. Among his musical projects of recent years, Iha has been a permanent fixture of A Perfect Circle.