I am not sure if you want count this one, but the currently ongoing "last mission of Cassini" involves the spacecraft changing its inclination gradually from 35 to 64 degrees when it goes through the gap between Saturn and the innermost part of the rings.
The manoeuvre is not done propulsively as large inclination changes are expensive, and the probe is almost out of fuel. (Just for the record, changing the inclination of a circular orbit by 23.9 degrees is as expensive as reaching escape velocity.) Instead, multiple fly-bys of the moon Titan is used to alter the orbit.
A similar approach was used for the Ulysses spacecraft that used a fly-by of Jupiter to enter a solar orbit with an inclination of 80.2 degrees to perform observations of the polar regions of the Sun.
I can not recall that any purely propulsional large change of inclination has been performed, but there exists a Russian plan to keep the ISS alive a little longer by moving their segment to a higher inclination.