This is a list of the top-level leaders for religious groups with at least 50,000 adherents, and that led anytime from January 1, 1401, to December 31, 1500. It should likewise only name leaders listed on other articles and lists.
Roman Catholic Church (complete list) –
Boniface IX, Pope (1389–1404)
Innocent VII, Pope (1404–1406)
Gregory XII, Pope (1406–1415)
Martin V, Pope (1417–1431)
Eugene IV, Pope (1431–1447)
Nicholas V, Pope (1447–1455)
Callixtus III, Pope (1455–1458)
Pius II, Pope (1458–1464)
Paul II, Pope (1464–1471)
Sixtus IV, Pope (1471–1484)
Innocent VIII, Pope (1484–1492)
Alexander VI, Pope (1492–1503)
Church of Constantinople – (complete list), the first among equals in Eastern Orthodoxy
Matthew I, Ecumenical Patriarch of Constantinople (1397–1410)
Euthymius II, Ecumenical Patriarch of Constantinople (1410–1416)
Joseph II, Ecumenical Patriarch of Constantinople (1416–1439)
Metrophanes II, Ecumenical Patriarch of Constantinople (1440–1443)
Gregory III Mammas, Ecumenical Patriarch of Constantinople (1443–1450)
Athanasius II, Ecumenical Patriarch of Constantinople (1450–1453) – see Fall of Constantinople
Gennadius II Scholarios, Ecumenical Patriarch of Constantinople (1454–1456, c.1463, c.1464–1465)
Isidore II Xanthopoulos, Ecumenical Patriarch of Constantinople (1456–1462)
Dionysius I, Ecumenical Patriarch of Constantinople (1466–1471, 1488–1490)
Symeon I, Ecumenical Patriarch of Constantinople (c.1466, 1471–1475, 1482–1486)
Raphael I, Ecumenical Patriarch of Constantinople (1475–1476)
Maximus III, Ecumenical Patriarch of Constantinople (1476–1482)
Symeon I, Ecumenical Patriarch of Constantinople (c.1466, 1471–1475, 1482–1486)
Nephon II, Ecumenical Patriarch of Constantinople (1486–1488, 1497–1498, 1502)
Dionysius I, Ecumenical Patriarch of Constantinople (1466–1471, 1488–1490)
Maximus IV, Ecumenical Patriarch of Constantinople (1491–1497)
Nephon II, Ecumenical Patriarch of Constantinople (1486–1488, 1497–1498, 1502)
Joachim I, Ecumenical Patriarch of Constantinople (1498–1502, 1504)
Coptic Orthodox Church, (complete list) –
John XIII, Pope and Patriarch (1483–1524)
List of 15th-century religious leaders Wikipedia (Text) CC BY-SA