Austria is your best bet if you ask me. Nicer and cheaper than France/Switzerland.
In Austria you will most likely have the choice between Hintertux, Stubai, Kaunertal, Kitzsteinhorn and Dachstein. There are other glaciers, but to my knowledge they don't have park.
Between those, Hintertux is a good choice. But to be fair, they're all really nice, and all have pretty good parks. Dachstein is literally only park, but it is a super fun and lappable one.
Just ask if you've got anymore questions.