I came across this very neat online tool from engaging-data dot com to visualize Federal taxes owed. As you play with the inputs, you can very easily see the dramatic differences in tax between income from LTCG and qualified dividends (in blue) versus ordinary income and unqualified dividends (in green).

In the snapshot below, a single filer in 2026 has income of $80K yet pays only $3,587 in Federal tax (in red)—a 4.5% effective tax rate.