I think most people here would consider once you start removing things, you've ventured out of "stock ROM" territory and into custom or at least "stockish" ROM territory. Reason being, what one person considers bloat, someone else might actually like. Although I'm with you, in that zero of the AT&T specific apps are remotely useful.
If you truly want something stock (but debloated) your best bet is probably to debloat yourself, although I'm sure you already know that.
The alternative is to look at the AT&T based custom ROMs like Skyfall or M8Rx and see if they meet your needs. Although, these still might be too "customized" based on what you are looking for. The ROMs mentioned are listed in my Index of the AT&T specific M8 forum: http://forum.xda-developers.com/show....php?t=2751432
For that matter, I wouldn't even limit myself to AT&T base, as in my opinion almost any other stock or custom ROM is better. Not only less bloat on many other carrier versions, but also things like WiFi hotspot (tethering) are not restricted (if you don't have a tethering plan).
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Phone: AT&T HTC One (M8)
Tablet: Samsung Galaxy Tab Pro 8.4 (WiFi only)