The White bio has its problems (from memory, he gets some of the command relationships in the Civil War badly wrong in a way that suggests his reading on the military side of things was pretty surface-level and his coverage of Native American affairs was very thin) but for a single volume that deals with Grant's whole life I don't know that you can do much better.And this is the problem with these discussions about Grant. Things get exaggerated all out of proportion. "99% of Whites" and "Murdered Native Americans for Sport" are prime examples.
Ron White is a good biographer, but I believe I mentioned others as well, such as Jean Edward Smith and Brooks Simpson. The writers who are horribly slanted against Grant - such as Rose, Varney, Moore, Leigh - have their own agendas.