I'm happy to help, if I can
That is a spectacular website. I'll bet it's even better in person. Wow!
Perusing their astounding selection did give me a few additional ideas. Again, I urge you to focus on American craft breweries if possible. There are few reasons to NOT "buy American" in this case.
I am not familiar with all of these beers, but I am well acquainted with some of the breweries.
I have always liked beers from Breckenridge, and their "Summer Bright" might suit you. Lakefront Brewery has an excellent reputation, and the Klisch Pilsner and ESB both appear to be nicely balanced, smaller beers. Goose Island Brewery makes some fantastic beer, and their Summertime appears to be pretty approachable. I have had good beer under the Berghoff label, and they have a Pils and a Lager you might enjoy.
I'd again urge you to consider Cream Ales, although the only ones at John's I could vouch for are Boddingtons (in cans with the nitrogen widget) and the previously mentioned Sleeman.
Finally, you might really enjoy Wit beers. The style is light, soft and distinctive, with unmalted wheat, curacao orange peel and coriander. I see that John's has one contract brewed for them (Generations White Ale), and it might be worthwhile if you've not experienced a Hoegaarden.
I might be able to be more helpful if I had more examples of beer that you really liked and why.
Be sure to report back with your observations!