You can argue both ways. Generally though you'd want to come to the ultimate conclusion that he is not.
You'd want to discuss reasons both for and against.
eg. if u wanted 2 say that More was not selfish, you could start by sayin "he may be seen as selfish by the audience because his refusal to sign the Act put his loved ones lives in danger and their quslity of life was dimished."
however u will want to after the first body paragraph start showing why he is ultimately not selfish. ie. "However, the audience is led to believe that More is not selfish because Bolt illustrates that a mans conscience is more important that a mans life, and it is his willingness to die to preserve his conscience that allows him to show qualities tht replicate a man who is unselfish."