That's what you're doing because all the Tigers you've listed just have the same chasis. M4A3, Easy8, Soviet Sherman, Dozer Sherman - hardly a difference... don't need a firefly imo. King Tiger/ Jagdtiger have same chasis, Tiger / Sturmtiger have only the same chasis. They don't look the same, neither they have the same role.
They don't feel all
that similar to me or at least they're very much like your examples, Dozer's useless against tanks and made for AI, Easy8 is a T-34-85 analogue, 76mm has the distinction of being a NASCAR car masquerading as a medium tank (
it must be a secret Panther!). I'm certain a Firefly addition would have the distinctive role you seek, at the very least. KT's to a Tiger like an Easy8 to an M4A3, JT's the same to an Elefant (though that is a entirely different unit we are not discussing, of course). And the TA's definitely not particularly inspired in terms of role... The
real unique one is the Sturmtiger, of course.
And I'd opposite to you prefer a glut of Shermans to a glut of heavies...that is obviously a topic we'd have to agree to disagree on.