DaHound mate go easy or your TL will become a flamewar and some mod will most likely closing it in the end.
Now do not think I am criticizing you for I ain't, and while I don't completely agree with Johnrankins, (I think classifying is battles as either defeats, Pyrrhic wins or statements is an exaggeration), we have to agree Lee took huge casualties on his battles, yes in most of them the enemy took more than him, but the Union could take those losses, the CSA couldn't.
Using Wiki for his battle record I got that he took almost 120,000 casualties over the all war, inflicting almost 160,000 to the Union. Statistically he as more casualties than the other Generals, but only because he lead the AoNV from 1862 to the end of the war, if a Union General had been in command of the AoP the same amount of time Lee was commanding the AoNV he would be bellow that General, but given that that didn't happen we have to accept that Lee is the general with the greatest casualty rate.
We don't know that. Among Southern Army Commanders both Johnstons, Bragg and Beuregard all took less percentage casualties. I think Grant, Thomas, and Sherman at the least would have taken less casualties than Lee.