Musonius Rufus
Musonius was a native of Italy, who lectured on philosophy in Rome in the first century AD. Epictetus attended his lectures and mentions him a number of times in the Discourses. So too did the Stoic opponents murdered by Nero.
Like Seneca, Musonius suffered at the hands of multiple emperors, exiled by both Nero and Vespasian on different occasions. For a while he was banished to the barren Greek island of Gyara, waterless until Musonius himself discovered a spring. He was not without company, though, for before too long admirers would travel there to see him.