Is the worst #1 or #20?
One question - are you looking for a âbattleâ general, or a âcampaignâ general? I would, for instance, argue that Napoleon was a magnificent âcampaignâ general, but his battlefield behavior, especially later in his fighting career, was downright unimaginative. Alexander was great on the battlefield, but he just didnât know when to stop campaigning (a man who literally loved fighting more than generalling.)
But I wonder: guys like Caesar (Gauls) and Charlemagne (Saxons), Genghis Kahn (everybody) killed many many civilians in their conquests. Does that make them good generals? Some would argue (I would, for one) that Genghis invented a system of fighting that overwhelmed everybody, and he didnât have to âgeneralâ at all. Caesar knew when to build a wall, and otherwise made use of an existing highly effective military some would say (I wouldnât).
Shaka is like Genghis - he invented a discipline and a deployment scheme. Zhukov wasnât very inventive; he won a lot, but he didnât win every time, and some would say he took absurdly high losses because his methods were not very deft (I would.).
Scipio beat Hannibal (and various lesser relatives), but Hannibal had spent 15+ years storming up and down Italy beating everything the Romans put up against him.
Wellington, some would say, was a dandy defender, but not so great in the attack (I would), fortunately for him, the French were more than obliging for him by attacking.
Balisarius rebuilt the Roman Empire in the West, but the Plague of Justinian might be thought to âhelpâ him by debilitating his enemies.
Some other names you might consider: US Grant, Stonewall Jackson, Red Cloud, Koniev, Tokugawa Ieyasu, James Longstreet, Tamberlain, Garnet Woolseley, Muhammad Ahmad (self-proclaimed Mahdi in 1881)
Names I suggest be taken out of your list: von Moltke - a great planner, and average commander; Balisarius (moved down to near the bottom), Scipio, Charlemagne, Churchill, Knud (tiny armies), Wellington, Eisenhower (a genius politician, never really commanded a force in battle), Shaka, and maybe others, depending on âgeneralâ definition.
For bad generals, I nominate Ambrose Burnside, Douglas Haig, George Custer, von Falkenhaym