I second the cox's. This harvest I bought several of each variety in the shop and cox's was my favorite by a mile.
I can imagine growers don’t like them as much though, despite the lack of patents and trademarks. In Europe they were abundant and amazing quality last year, lasting into February. This harvest their flavour wasn’t there, many were mealy, and they were unavailable within a month. Their worst year as far as I can remember.
Rubinette is a medium sized yellow apple, streaked in reddish brown. Not particularly eye-catching and also prone to fungal diseases. But Rubinette has a secret, is a seedling of Cox x Golden delicious, and its flavor is fantastic.
Modern apples with not so sophisticated flavor but better resistance can be much more satisfactory.