Class With Full BaB and Tumble as a Class Skill?

[Vrock_Summoner]

I'm hoping to find a single class that lets me take Einhander right at level 6. Anything fit the bill?

[VoxRationis]

Swashbuckler, though it's not very good (plus it has better Fortitude saves than Reflex saves, which is odd).

[OldTrees1]

Any class with Ride as a class skill (Barbarian, Fighter, Paladin, Ranger, ...) can trade it for Tumble via the Skilled City Dweller (https://www.wizards.com/default.asp?x=dnd/we/20070228a) ACF

[Alex12]

Warblade has full BAB and Tumble, and is a good solid melee class

[Yorrin]

Any class with Ride as a class skill (Barbarian, Fighter, Paladin, Ranger, ...) can trade it for Tumble via the Skilled City Dweller (https://www.wizards.com/default.asp?x=dnd/we/20070228a) ACF

+1 to this. This is the route I usually take.

[StreamOfTheSky]

In addition to Warblade, Swashbuckler, and Skilled City Dweller, anyone who takes Martial Study for a Desert Wind maneuver (I'd suggest Distracting Ember for a swift action flanking buddy) gets Tumble as a class skill.

[Shining Wrath]

If no one's mentioned it yet, Warblade. Full BAB, D12 HD, and Tumble is on the list.

EDIT: Battle Dancer not only gets Tumble, but class features rely on it. Many require N ranks in Tumble to use.

[RavynsLand]

Swashbuckler, though it's not very good (plus it has better Fortitude saves than Reflex saves, which is odd).

It's the bomb with Daring Outlaw. Insightful Strike also synergizes well with Warblade, Wizard, and Factotum.

[Curmudgeon]

Swashbuckler, though it's not very good (plus it has better Fortitude saves than Reflex saves, which is odd).
The general class design formula WotC followed was to couple full BAB and good Fortitude saves. There are some exceptions (Hexblade and Knight come to mind), but it's the rule more often than not.

[Grayson01]

Any class with Ride as a class skill (Barbarian, Fighter, Paladin, Ranger, ...) can trade it for Tumble via the Skilled City Dweller (https://www.wizards.com/default.asp?x=dnd/we/20070228a) ACF

CityScape?

[OldTrees1]

CityScape?

The Web Enhancement for the Cityscape WotC splatbook.