I have had Rig Red Wagon in my garden for two years and it has been the best pollen parent each year. This seems to agree strongly with the data I have found for it as a pollen parent in the database where, of its 29 registered offspring 26 are with it as a pollen parent. Some of last year's seedlings are pretty exciting even as first years blooms.
As far as pod parents, I think that Diana's Pink Gown set the most pods with Crowning Light coming in a close second.
If you want to go into the poorest performers, its really hard to say regarding pollen parents as I don't really keep tract of crosses that do not take. However, I will say that it has been difficult to set pods on Miss Scarlet and Bella Note both this year and last year. Home of the Free set one or two pods this year, but did better last year, so perhaps it was recovering from the better year in 2015.
Here are pictures of a few of the first year blooming seedlings using Big Red Wagon as the pollen parent:
Willie Markus X Big Red Wagon - - - - - - Alan Lane Agin X Big Red Wagon
Alan Lane Agin X Big Red Wagon - - - - - Jasmine Rossi X Big Red Wagon