We got seeds for glacier from Sandhill preservation. They grew and produced well. A friend LOVED them. So, this year while seed shopping, I came across another source of Glacier seeds: John Scheeper’s Kitchen Garden Seeds. Of course, I bought a pack bc I knew I’d grow Glacier again this year.In my experience (I grew them last year) Early Girl is very much a store-type tomato. They produce a lot and store very well, but the flavor is sub-par (admittedly with heavy rain, which can dilute flavor, but the other tomatoes I grew tasted a lot better). I decided not to grow them this year. EDT: They're a very uniform shape and size. Very pretty tomatoes.
Rutgers tomatoes (which aren't on your list) are a smaller slicing tomato, but very prolific, fairly early, and the flavor is decent.
I think I'll try Glacier next year.
Now I have a few Glacier plants, and gave a few to the friend that loved them for his garden. Interestingly, these two sources (JSKGS and SHP) produced tomato plants with different leaves: one has typical tomato leaves, the other is potato leafed!! Waiting for tomatoes (I planted out later than usual), so I’ll have to report back on the two Glacier tomatoes!