So they do!Off the top of my head? The Lich and the Specter
Interestingly, there is no "spell attack" under actions in the SRD. There is an attack action, defined as being ranged or melee, and a cast spell action, but not a spell attack action. I'll have to dig out my MM and see if it says anything.
Note that my interest is mostly academic. I'm just curious what the design intent was behind those choices. I don't actually care about "the debate" and it isn't my goal to spoil this thread with it. And given my Gaming style if a player ever asked to counterspell it and I saw "spell attack" I'd probably allow it, just because.