Mishnah in Horayos 3,8 says:
מַמְזֵר תַּלְמִיד חָכָם קוֹדֵם לְכֹהֵן גָּדוֹל עַם הָאָרֶץ:
(the scholar mamzer takes precedence over the ignorant high priest.)
Do we have a practical example of this statement? Did we ever (in our sources) precede a Mamzer Rabbi to a Cohen Gadol or similar?
Do we know of a prominent Rabbi that was a Mamzer?