Helvetica, or Times New Roman. Or any of their relatives or clones. Modeled on fonts that were modeled on fonts that were, originally, modeled (for lower case) on Renaissance Italian scribal forms, and (for upper case) Roman monumental inscriptions. Typefaces are incredibly conservative, really: <a href="https://upload.wikimedia.org/wikipedia/en/2/21/Trajan_inscription_duotone.jpg" rel="nofollow noreferrer">https://upload.wikimedia.org/wikipedia/en/2/21/Trajan_inscri...</a>
Arial and Verdana are probably your best bets. The cockroaches that survived the millennia and living today have the best chances of surviving more future millennia too!