The US WW2 turreted tank destroyers would like to have a word with you. Also, modern TDs are almost all armored cars with a big gun or missile battery on top.
I said typically and I had Jagdpanthers, Jagdtigers, and Sturmgeschutz in mind. TD's in the current armoured divisions are multi-role and not designated soley as tank destroyers. Bradley AFV's carry anti-tank missiles but that is a secondary role to infantry support. Apache's are usually the anti-tank weapon of choice.