“...A great general? ...”
Yes. His tactics are still studied in war colleges the world over.
So are Rommel’s. He killed Americans, and British as well in North Africa, and his handiwork was all over Normandy. And he is also considered a great general.
From a purely military tactical and strategic standpoint, yes - he WAS a great general. The context of the word “great” is what is being discussed. As in “he was a military commander that knew and excelled at his trade”.
And as Bull Snipe pointed out, he WAS offered command of Union forces. And because he WAS a Great General, he probably would have caused complete havoc to the Confederate forces had he done so.
Read more into Rommel. He wasn’t as great as he was cracked up to be. He certainly was not without skill I’ll grant and although not a Nazi he served an evil regime. I look more at what men do then what they say or is said about them.