Dragon/Fire, Dragon/Water, Dragon/Ice, and Dragon/Steel are the combinations that allow a Dragon type to be neutral to Ice. Appletun is the only Dragon type with Thick Fat, and it's still 2x weak to Ice. This means the list as of The Indigo Disk consists of:
Mega Charizard X
Kingdra
Dialga
Dialga-Origin
Palkia
Palkia-Origin
Reshiram
Kyurem
Kyurem-White
Kyurem-Black
Goodra-Hisui
Turtonator
Dracovish
Duraludon
Tatsugiri
Frigibax
Arctibax
Baxcalibur
Walking Wake
Archaludon
Gouging Fire
If you want to remove Ubers from this list, check the list of Ubers of whichever generation you're playing.
