Most important, influential, or significant
That should be foremost in all of your minds.
The foremost Frenchman, the one with the hooked nose, was already so close that the expression of his face could be seen.
He was the foremost Jewish figure of the 18th century, and to him is attributable the renaissance of the House of Israel.
The ice gave way under one of the foremost soldiers, and one leg slipped into the water.
First and foremost was an overwhelming urge to punch his lights out but past similar responses hadn't produced positive results.