Heh, other than Cleric, I've played every one of those "essential" classes you list at least once (assuming PHB Wizard and Rogue for Magic-User and Thief).
Almost every single character I've played is on that list, with one significant exception:
Human Tactical Warlord. Started at level 5, died at level 6. I enjoyed playing him, for the most part, though Leader is not my preferred role. Died in Thunderspire Labyrinth in the clutches of the Phalagar, alongside the party's Warlock. The party's pre-errata Battlerager Fighter made it through the fight without losing a single real hitpoint.
The warlord's replacement, a halfling rogue, lasted for about three encounters before dying. He was replaced by a Dragonborn Barbarian who outlived the campaign, and later moved on to do the first chunk of the Tomb of Horrors, which he also survived. He remains alive, somewhere.
I also briefly played a monk for about three sessions of an Encounters season, before he bit the dust. Or had his mind consumed by thoughteaters. Something like that. Fun while it lasted, though my dice-luck was abominable with him. Missed constantly, failed saves, failed skill checks.
Most of the characters that I really want to play (and have built as either back-ups to current characters, or as "just in case an appropriate campaign comes along...") fall on your essential list, though I would like to eventually play a Bard and a Warlock.
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To answer the question many seem to be answering, rather than the one you asked ("Essential" might have been the wrong word to choose...), I have yet to play as an Essentials character. I would like to try a few of the subclasses, though. Thief, Slayer, and Knight all look worth a try to me. Even Mage looks like it might be interesting, and I really didn't enjoy playing a Wizard last time I tried.
In the campaign I play in, one player currently plays a Slayer while another plays a Hexblade. I and the other two players play pre-Essentials classes.
In the campaign I DM, only one player has played an Essentials class, and it's his current Warpriest, who is about an encounter and a half into his existence.