If they are based on each class....easy choices are Bard and Artificer. They're close enough to spellcasters and rogues that they don't necessarily need their own destiny right away. Ranger and Druid could likely share a destiny to start as well. Same with Cleric and Favored Soul.
I wouldn't really see it as getting shafted. With how the system seems designed, there would be any "ideal" epic destiny for a particular class. It will come down to personal choice of playstyle.