I've been checking where agents have gotten their clients published. Should I be concerned if I don't see any larger publishers or publishers on my wish list? I wonder if maybe the books the agents were shopping weren't of interest to the larger ones or maybe the agents didn't have the right contacts with them. Is it advisable to still query them, then if I get 'the call' inquire about such things and make a decisions from there?You're operating from an incomplete data base, no matter how carefully you research agents.
Not all deals are reported. Not all books have acknowledgements. Not all agents list all deals on their website or blog. (I myself am WOEFULLY behind on posting deals for example.)
You're also operating from a limited knowledge base about publishers. There is a lot of information about publishers you'll never see in public forum, and I wouldn't tell you unless you were a client and we were reviewing the submission data base.
In other words, you don't know enough to start culling agents at this point.
When you get an offer of representation, be forthright with your agent about what you want and then LISTEN to her/him when she gives you some info that might change your mind.