I believe Hannibal is the GOAT of great commanders

Comparing him to other great commanders,
‌- Alexander
Philip II had already established the military foundation,
making him already the hegemon of the current Greece and Turkey regions,
and he had the support of outstanding generals like Parmenion.
- Genghis Khan
He had the support of outstanding generals like the Four Dogs of War,
and some even argue that in terms of pure field combat ability, he didn't reach the level of Jamukha.
- Napoleon
Even before Napoleon's emergence, the morale of the French militia and their artillery technology already surpassed other nations,
and generals like Masséna, Davout, and Lannes were capable of
holding their own against other countries' aces, while dominating everyone else.
- Caesar
The Roman army was already a hegemon,
and Caesar's greatest rival was Pompey, who was also part of the Roman military.
Naturally, the generals under Caesar were also top-tier personnel.
- Hannibal
It is safe to say he practically had no support at all.
Looking at the entire war, aside from himself, the rest barely managed a single win,
and even that one win is evaluated as a diplomatic victory rather than a military one;
yet, using solely his own strength, he crushed the Roman army about three or four times.