Of Lord Godalming, Quincy Morris, and Dr. Seward, do you suspect any of these men of possibly being on Dracula’s side?
In terms of the novel's characterization and construction, I do not suspect Morris, Seward, or Holmwood in being on Dracula's side. The commitment they have made to one another in defeating him and the intensity with which they pursue him helps to confirm this. In the telling of the novel, one in which the theme of condemnation and salvation is evident in Dracula representing the former and the men hunting him representing the latter, their pursuit and eventual conquering of Dracula makes it so that they are not necessarily in collusion with him. That being said, I think that it might be an interesting aside to suggest that while the men do not support Dracula, they seek to emulate his power. Each man, in his own right, wishes to assert power. Dr. Seward seeks to do this through science. Lord Godalming does so through social prestige and landed title. Quincy does this through seeking the hand of Mina, along with his American ancestry, and then supporting her when he she chooses Arthur. The alliance between the three of them indicates that they recognize the awesome power of Dracula. In aligning to stop him, there is a potential desire to covet such power. As the novel clearly delineates gender roles between men and women, the issue of power is one in which men possess. Through seeing Dracula's intense power and the magnitude with which he uses it, the men might possess some level of desire in coveting this power for themselves, reason enough to ally themselves with one another.