Oh dear...a certain recurring feeling is incarnate in this thread...it's almost like it's happened before...
However, seconding Bob's comment, perhaps you might find some of the discussion you're looking for in the passenger section, James. Ismay, his actions and character, have been discussed at some considerable length. Opinions range the full spectrum from admiration to execration, and everything in between. While there is no consensus as such, most people seem to be moving towards acknowledging his flaws in both character and action, but also recognising his essential humanity. He might not be the sneering villain of some of his screen incarnations, but at the same time there are question marks over certain aspects of his actions and evidence after the disaster.