Is the Rogue essential? No. Of the PHB classes all you really need is Cleric (or Druid) and Wizard.
An all cleric party can be quite potent and deal with just about any problem put before it.
Snipped and altered for my amusement.
delericho said:
...I think Trapfinding Favored Enemy should be a feat (or, just not required at all). Other than that, there's nothing in the Rogue Ranger class that is truly irreplacable...
All this talk about how the rogue isn't required and yet nobody (that I've noticed, haven't scanned every post) has mentioned how superfluous the barbarian, bard, paladin, ranger and sorcerer are.
Barbarian: Rage (feat chain), fast movement (meh), weak DR (meh)
Bard: 3rd edition's bard has lost touch with what the Bard used to be... the original Prestige Class. Social skills (open skills up to all classes), Bardic Knowledge (PrC ability), Bardic Song (PrC or Rogue special ability), incompetence (any poorly made character, you don't need a "special" base class for this!).
Paladin: Smite (cleric domain or three), Unique Spells (easy to ignore or absorb into the already potent Cleric spell-list), Poke'mount (g'bye!), "Martial Arm of the Church" (Cleric does it better anyways).
Ranger: Favored Enemy (feat), Camouflage (new rogue special ability), Hide in Plain Sight (new rogue special ability).
Sorc: Wizard-for-dummies (no offense intended). Several non-core classes have since done the "Wizard-lite" role better. Such as battle-sorc, psion, warlock, warmage, wilder... and I'm sure you folks could think of a few more.