Short answer: not simply. “Stronger” depends on dose, route of administration, and individual sensitivity. You cannot rank 5-MeO-DMT, DMT, and psilocybin in absolute terms without that context.
5-MeO-DMT is very potent per milligram and has a fast, steep onset when inhaled, which many report as an abrupt, intense ego dissolution with relatively sparse visuals. That rapid spike often makes it feel like the most forceful in the shortest time.
DMT is typically brief and highly visual when inhaled, while oral DMT with MAO inhibition lasts much longer and can go just as deep by giving more time in the state. Psilocybin also lasts hours, and higher doses are often reported to produce profound self-boundary loss, though the build-up is slower than 5-MeO-DMT.
So the “strongest” depends on what you mean: fastest annihilation, longest immersion, or most visionary complexity. For a concise side-by-side, see this comparison. Bottom line: no single winner, only different dynamics.