More than one. Consider the strongest magnets, Neodymium magnets. They are made of a metallic-appearing chemical compound (not technically an actual metal) composed of Neodymium, Iron and Boron, with the chemical formula of Nd2Fe14B. True metal magnets made of a metallic alloy called "Alnico" (a mixture, or alloy, of Aluminum, Nickel and Cobalt) were once considered to be the strongest magnets, but are not as strong as Neodymium magnets. So any of those specific metals mentioned above could be the answer to your question.
The main metals that are magnetic are 1) Iron 2) Nickel and 3) Cobalt