Both ibuprofen and acetaminophen have been linked to liver failure. But you do make a good point. when it comes to the liver, acetaminophen is much worse.
Acetaminophen (tylenol) has been linked to liver failure when taken while drinking alcohol.
As I recall, in 2008, the FBI's alleged Amerithrax culprit, Bruce Edward Ivins, committed suicide by overdosing on acetaminophen.