Emperor Carinus. Emperor from 282 to 285 - he was considered one of the worst rulers in Roman history. There are several versions of his death - in one of them he was assassinated by one of his officers after he seduced that man's wife.
Antoninus Pius. Roman Emperor from 138 to 161 AD. Marble. Metropolitan Museum of Art, New York. Number 4 of the Five Good Emperors, he reigned over a time of relative peace, and had the good sense to designate Marcus Aurelius as his heir. (Lucius Verus co-ruled with Marcus for awhile but he basically just threw parties.)