Navarre is chock full of rentals, very nice ones too. I'm not sure that any of them are 'pure' timeshare.
There are several large rental agencies and a very strong VRBO presence. I've stayed in the Beach Colony Resort and really enjoyed it. Great set-up. I know there are 3br units and maybe 4br's as well. Might be only penthouses that are 4br.
good luck!