Ive never covered an insurance agent other than myself. So you certainly have more experience with this occupation given your position.
I am not saying using a SS is the "best" way to go. All I am saying is that I have had multiple white collar clients come back different than usual with Guardian because of "non-standard" job duties. Perhaps I was a bit drastic at first saying to just discount the usual suspects and go with Assurity. But I am always super conservative when setting expectations for a DI policy.
I follow that the old maxim: "wildly overpromise and massively underdeliver" normally works best in these random quoting situations...I think that it goes something like that.
Seriously, I agree with what you're saying but 1) Guardian is awesome but can be tough...although in this case it is unlikely that they would be and 2) SS offset sucks unless you're a truck driver unloading your cargo (and even then it is still not preferable but likely all that you're going to get).
Out of the carriers that OP listed, Illinois Mutual would be his only option for pure base, although I wouldn't insure an agent with any of those products.