I surrender to the Thief.

Philosophically, I really like the idea of D&D only having three classes. I also really don't like the problems that the thief introduces into D&D. Such as encouraging other classes not to attempt thief like actions, and the inclusion of a skill system. However, I find that players seem to like having more character classes to choose from. I keep trying to convince them that the Fighting-Man and Magic-User are all that is required to portray any character concept, but I am perhaps, not convincing enough. I was also reared in AD&D 2nd Edition, and the proliferation of snowflakes is hard to avoid. 
So, I surrender to the Thief. 

There are two types of Thieves. The Supplement I Thief, who is physically weak, but mechanically apt, and in command of preternatural or magical powers that allow hiding in shadows , climbing walls, and backstabbing. And the Rogue of later editions, who uses her Dexterity as a lightly armed fighter. 

Thief

Prime Req: DEX

HD: d4

Attack: as magic user

Save: as thief

XP: As thief

The thief uses Dyson's 2d6 Thief skill system: https://rpgcharacters.wordpress.com/2009/08/01/d6-and-2d6-thiefin-for-basic-dungeons-dragons/

The Thief has preternatural affinities  that allow them to perform almost magical physical feats while still remaining flabby and weak. In addition to the skills and abilities of the Thief found in Swords & Wizardry the Thief has the following power: 

Legerdemain: The thief relies not only on knowledge and skill to perform his abilities, but taps into a shadowy power. Once a day per level, they automatically succeed in any thief skill check.

Rogue

Prime Req; DEX and CHA (+5% for each)

HD: d8

Attack: as fighter

Save: As thief

XP: As fighter

Swashbuckler: When wearing light or no armor, and wielding 1 handed weapons, or 1 handed weapon and buckler, the rogue adds her DEX bonus to hit in melee.

Nimble: When wearing light or no armor the rogue may immediately leave melee combat when using the withdraw maneuver . (Alternately , does not provoke a free attack when leaving melee)

May use the Fighter Parry maneuver.

Dastardly: Starting at third level, the Rogue may use the following thief abilities as if they were a thief of three levels lower: Climb Walls, Hide in Shadows, Move Silently , and Back stab.

Charming: Hirelings and specialist cost half as much. Additional +1 to reaction roll when recruiting henchmen.