Please help me make an effective Ghostwalk ghost

[Kaje]

So I'm interested in making a Ghostwalk-style ghost and am unsure of where to go. For classes I'm of course looking at Eidolon, Master of the Unseen Hand, and Fiend of Possession. Incarnum seems like it has nice fluff-synergy with ghosts. Maybe there's an avenue there?

Basically everything 3.0-3.5 is allowed. I'm not a fan of casters.

[MaxiDuRaritry]

I would normally suggest you avoid the Ghostwalk template like the plague and go for one or more levels of the savage progression, but I won't this time.

[Extra Anchovies]

I don't really have much personal experience with the Eidolon, but here's a partial handbook (http://www.giantitp.com/forums/showthread.php?239930-3-5-The-Eidolon-Handbook-Any-feedback-is-appreciated-)) that might be worth taking a look at for some ideas.

[Telonius]

Rogue/Swordsage with Craven, focusing on Shadow Hand, could be really nasty. (EDIT: be sure to have a Ghost Touch weapon, or some other way to make sure your hits can connect against corporeal foes).