Honour was in quite short supply back in 15th Century England. The Stanleys stand out because they were prominent personalities. I would be interested to see who anyone sees as being 'honourable' in this period.
Case in point - Buckingham's Rebellion. The bulk of rebels involved were all former adherents and supporters of Edward IV, rather than Lancastrians, so were mainly Yorkists turning against a Yorkist King, who himself had usurped his nephews to gain the throne. Actual Lancastrian involvement was minimal.