Tony Stark

Tony Stark operated as Iron Man before Arno Stark.

Biography
Athey believed that Arno Stark inherited his Iron Man armour from Tony, his predecessor. (COMIC: The Cast Iron Contract)

Other references
The character was featured on a young Grant Gordon's bedsheets, among other Marvel heroes. (TV: The Return of Doctor Mysterio)

Behind the scenes
Tony Stark was not explicitly named in The Cast Iron Contract or The Return of Doctor Mysterio.