Some contamporary (after 1821) Greeks (a very small sample)
Ioannis Kapodistrias.
We (Greeks) know him as the first Governor of liberated Greece right?
“In 1809 Kapodistrias entered the service of Alexander I of Russia.[20] His first important mission, in November 1813, was as unofficial Russian ambassador to Switzerland, with the task of helping disentangle the country from the French dominance imposed by Napoleon. He secured Swiss unity, independence and neutrality, which were formally guaranteed by the Great Powers, and actively facilitated the initiation of a new Constitution for the 19 cantons that were the component states of Switzerland, with personal drafts.[21] In the ensuing Congress of Vienna, 1815, as the Russian minister, he counterbalanced the paramount influence of the Austrian minister, Prince Metternich, and insisted on French state unity under a Bourbon monarch. He also obtained new international guarantees for the Constitution and neutrality of Switzerland through an agreement among the Powers. After these brilliant diplomatic successes, Alexander I appointed Kapodistrias joint Foreign Minister of Russia (with Karl Robert Nesselrode).”
http://en.wikipedia.org/wiki/Ioannis_Ka ... r_Republic
Dr. George Papanikolaou (Pap test).
“The Papanicolaou test (also called Pap smear, Pap test, cervical smear, or smear test) is a screening test used in to detect pre-cancerous and cancerous processes in the endocervical canal (transformation zone) of the female reproductive system. Changes can be treated, thus preventing cervical cancer. The test was invented by and named after the prominent Greek doctor Georgios Papanikolaou. An anal Pap smear is an adaptation of the procedure to screen and detect anal cancers.”
http://en.wikipedia.org/wiki/Pap_test
Thanassis Economou
“Economou also built the Alpha Proton X-ray Spectrometer that successfully performed the first chemical analysis of martian rocks aboard the Mars Pathfinder rover in 1997.”
http://en.sae.gr/?id=18180