Wiktionary
wheelhorse
n. A person who labors heavily for a particular cause, without being concerned about recognition
Usage examples of "wheelhorse".
I recognized the man—Senator Gottlieb, a wheelhorse who would vote for his own lynching if it were on his party's program.
I recognized the man-Senator Gottlieb, a wheelhorse who would vote for his own lynching if it were on his party's program.
I recognized the man-Senator Gottlieb, a wheelhorse who would vote for his own lynching if it were on his party’s program.
The rest, including the scientific and mechanical geniuses like lindy, and the wheelhorses like me, merely have to obey.