Founders adjectives are listed in this post. Each word below can often be found in front of the noun founders in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing FOUNDERS.
actual, american, ancient, century, chief
early, first, google, great, illustrious
joint, legendary, many, mythical, original
other, pious, principal, puritan, real
religious, reputed, respective, several, such
Hope this word list had the adjective used with founders you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.