This is the Contemptor Class Close Combat Dreadnought who goes by Chuck in the catalogues! He’s an old Rogue Trader metal mini. Here he is next to a new Terminator:
This awesome sculpt was initially shown as Brother Meredith, and by 1991 was Bolter 11 and part number 070106/10. He seems to have been named after Burgess Meredith, who played the Penguin in the 1960s Batman TV show.