Complex sentence: Despite being a secular philosopher, Plethon was chosen on the basis of his renowned wisdom and morality to accompany John VIII as a delegate, along with his students John Bessarion, Mark Eugenikos and George Scholarios.
Split into simpler sentences: Despite being a secular philosopher, Plethon was chosen to accompany John VIII on the basis of his renowned wisdom and morality. Other delegates included Plethon's students John Bessarion, Mark Eugenikos and George Scholarios.