Sounds like a good list . . . except for the Oozes, Slimes and Jellies.  I've always thought that the reason there aren't many of those minis is that no one wants those minis!  Whose was going to spend their hard earned cash on a little lump of lead?  

Interestingly, one of my regular ebay searches is for oozes, slimes, & jellies!  I collect all pre-1985 o,s,&j.  Otyughs too.  I believe I have every otyugh mini ever produced.  
So if you were to make that line, I'd be buying some slimes!  
As for Demons & Devils, I find Reaper minis makes great ones, near duplicates of 1st edition MM.  Their skeletons & giants are great too, IMHO.

Most of the things on my wish list you wouldn't be able to do without WOTC suing you.  Here is my wish list for miniatures that should be made as exact replilcas of 1st edition MMs:
Umber Hulk
Hooked Horror
Roper
Otyugh (TSR made a great one back in the day, on the green blister cards, but it was way too small)
Drider
Beholder
Grell
Carrion Crawler
fungul monsters (I know Reaper makes some happy-go-lucky ones, I'm looking for the mean nasty ones like Grenadier put out)

Fantastic!
That is really great!
What about such Gelatinous Cube on a dwarven forge ground, in order to avoid the support ?
That is very interesting, bravo!

I'd say Cube it on a flagstone base. It would lay almost flush with the terrain. No black base. Throw some gold coins inside it, and it would be perfect. I would definitely be interested in one.

Egg of Coot over on Dragonsfoot has a great gelatinous cube interested parties should check out

http://www.dragonsfoot.org/forums/viewt ... 1&start=60

and for some other figures see:

http://www.dragonsfoot.org/forums/viewtopic.php?t=19769
and
http://www.dragonsfoot.org/forums/viewtopic.php?t=19788

Those are some great looking cubes, I must have one... nice touch with the skeleton   and to think back in the day I used an ice cube.    


Q: My MM is out of reach, in the description for the GC does it say they are transparent? or "colored"?

Definitely giants!   They may not be an underrepresented monster, but they're rarely done well.  As different species from homo sapiens, giants should look mythic, or at least fairy-tale.  Most I've seen just look like humans on a bigger scale, and some are just plain terrible.   Tom Meier's 70's work for Ral Partha is IMHO the gold standard:  http://www.sodemons.com/rhrp01gallery/r ... tgiant.jpg
Now that's a frost giant not just some 52mm viking.

-hello tiger. yes i agree. have not seen many good giants since the few originals like Meiers.[/quote]

Glad to meet another fan, Rakeesh! Meier's sculpting has an Arthur-Rackhamesque quality that puts you squarely in a fantasy atmosphere.  Unfortunately I don't think he's done any giants since the mid-80s.   Tom Loback's giants for Dragontooth were good too, but not as delicately sculpted.  I'd be curious to hear what plans if any the OP has for giants.

I wanna cube!

hmm.. minis i'd like to see... perhaps vrock before 3rd ed made them purple... I mean ewww... why are they purple!?
and a decent representation of an erynis would be nice... you know.. one that didn't look like a devil she harpy.

and yes! beholders! all the subbreeds too! because observers are so ridiculously cute