Sean Cullen was awarded the 2024 Katherine Cornell Award for his portrayal of Joe Keller in "All My Sons," at Buffalo's Road Less Traveled Theater. He's appearing now in the streaming series "The Green Veil," starring John Leguizamo; and later this year will play Mac Shepard in "The Reunion," a new feature written and directed by Roland Ellis. Sean's previous credits include Maria Schrader's "She Said" (Universal), with Zoe Kazan and Carey Mulligan; and "The Hating Game," adapted from the best-selling novel and directed by Peter Hutchings. Sea…