Good list! Here's another good one:

Patlabor The Mobile Police TV Episode 27: "A Voice In The Darkness" in which SV2 is training in a condemmed hotel that turns out to be actually haunted. Seeing Takeo Kumagami's reaction to it all is worth the price of admission alone IMO!

Good list! Here's another good one:

Patlabor The Mobile Police TV Episode 27: "A Voice In The Darkness" in which SV2 is training in a condemmed hotel that turns out to be actually haunted. Seeing Takeo Kumagami's reaction to it all is worth the price of admission alone IMO!

One that is seriously missing from this list:

Mahou Sensei Negima! (Xebec version) Episode 19. One of the few "excellent" episodes of Xebec's take on the Negima franchise, this episode, which is the show's "intro episode" from ghost student Sayo, as considered by some to be even better than Sayo's intro story in the manga.

One of my favorite is Zero Zero episode 14 "Frightday the 13th".

 I have to agree with the Mahoromatic and Princess Resurrection episodes!  The one in PR was one of the best creepy episodes I've ever seen and probably the best of the series.  It was definitely memorable.