And of course, this all depends upon the game.
If your DM is running a module by the book, yeah, your wizard, sorcerer, cleric, and druid party might have some trouble. If your DM is running a campaign set in a magical university, then the party of wizards and clerics is gonna do just fine.
In a basic game, party of four, by the core book, I'd say that you'd be fine with:
Cleric: War and Trickery domains, serves as Tank and occasional scout
Cleric: Healing and Protection domains, serves as Buffer and healer
Wizard: Generalist, takes care of default magical needs all across the board
Sorcerer: Evoker-cannon
The Bard is only barely a core spellcasting class given its spell progression, so if the intent is "All-caster campaign," it's a stretch. If the goal is "magic-heavy campaign", though, a bard is a fine choice either as a fifth PC or as a replacement for the Generalist Wizard as a utility player. (He takes over the sneaking role from the War cleric and the buffing role from the Healing cleric.)