If you specifically will only consider an external unfused disconnect device, I think this would qualify:
However I think you are making things unnecessarily difficult on yourself.
In post 7 you state "I'm looking for a solution where the meter has a safety switch for firefighters, but it's not a main breaker." You want something outside that acts as a switch, and something inside that is considered the main breaker, in the enclosure where you will land your GECs with only a 3 wire feed from outside to inside.
The reason that we are getting caught up on the nuance of 'what is a service disconnect' and 'what is an emergency disconnect' is that if you have an appropriate piece of equipment with an appropriate label, even if it has OCPD it is still
not the main breaker. In other words with the appropriate label that outside OCPD magically becomes just a switch.
Outside OCPD might be undesirable from a coordination point of view (did my main trip or did my emergency disconnect trip), and presumably an outdoor OCPD would be less reliable than a pure switch, so I can see why you would want to avoid that. But if your goal is simple the least expensive code compliant installation I think a 'emergency disconnect only' meter main is the way to go.
-Jon