Crusading Footpad in the Quintessential Rogue.  They get  a +2 divine bonus to all saves, +2 reflex, and a divine companion at first level (treat as familiar).  They get sneak attack undead at second and every other level i believe, along with a detect evil(like a paladin).  the sneak attack undead is ONLY that amount of damage, and i dont believe it stacks with other sneak attacks...so youd have one amount for non undead, another for undead.
I played one of these for all of two levels before being killed and the game ending.  Just recall one thing.  With a weasel companion, I went from a +13 reflex save to a +19 reflex save in one level.  +2 +2 +2.  Add that to my rogue levels and evasion....who needs improved evasion?  I never failed a save.  the wizard dropped fireballs on me intentionally.
I did it as a CG worshipper of Olidammara in a Greyhawk campaign.  Went from CN to CG over the course of the campaign, became a cleric, then went CF