CREATE TABLE table_204_219 (id DECIMAL, "date" TEXT, "time" TEXT, "opponent#" TEXT, "rank#" TEXT, "site" TEXT, "tv" TEXT, "result" TEXT, "attendance" DECIMAL)

which team has the highest rank among those listed ?
SELECT "opponent#" FROM table_204_219 ORDER BY "rank#" LIMIT 1
SELECT "opponent#" FROM "table_204_219" ORDER BY "rank#" NULLS FIRST LIMIT 1