Okay, here we go... (I'm a bassist, just in case anyone wonders):
Rush - everything, especially the albums between "Permanent Waves" and "Hold Your Fire"
I'm still amazed at how many kinds of different basslines and little licks for different kinds of music Geddy Lee has come up with over the years, using mostly "conventional" bass playing.
In those six albums alone, there's quirky prog, funky stuff, laid-back reggea, fast riffs bordering on punk and pulsing bass synth sounds.
Dream Theater - Images And Words
This album more or less put the bass on the map as an instrument for me. Still contains some of Myung's most tasteful and original playing with a gorgeous tone on top.
Fates Warning - A Pleasant Shade Of Grey
Joey Vera is an awesome bassist in his own right, and while he added something to every Fates Warning record he has played on, this album should serve as his masterpiece.
The versatility on display here is astonishing, especially for a "metal" record (which it actually isn't). APSOG contains technical riffing, smooth fretless playing, punching slap (with an awesome tone!) and effect-laden minimalistic riffs all rolled into one.
Enchant - Tug Of War
While I've come to like most Enchant albums more than this one over the years, "Tug Of War" rightfully is a part of this list for much the same reasons as APSOG above.
Ed Platt is a masterful player with a great sense of rhythm and an excellent choice of notes, and it shows here in a bootload of tasteful bass grooves and breathtaking slap and tap breaks. I hope his recent endorsement of Conklin GT7 basses doesn't mar his style with "extended range" clichés.
Queensryche - Operation: Mindcrime
Somewhat of an odd choice, being a straight-up metal record, but inside that niche, Eddie Jackson's playing is a perfect fit. Plus, the production is simply perfect. Still for my money one of the best metal albums ever made.
Queen - Queen II & A Night At The Opera
John Deacon is pretty much a god of all things four strings. He always stays in the pocket, but all the same is instantly recognizable with his effective basslines and trademark little doodles. I love his acoustic bass playing on the latter album.
Led Zeppelin - II
Uriah Heep - Demons & Wizards
Two albums with fantastic and totally musical bass playing. JPJ's work on "II" is especially noteworthy for ranging from soft, almost tender grooves to crunching power chord stuff. "II" generally features some of the most awe-inspiring rhythm work in rock ever.
Some more bassists I admire, but haven't had the chance to deeply delve into their work yet:
Stanley Clarke (one of the very few jazz bassists I really like... he has that certain spark and punch most of his colleagues lack in my ears... for the record: I'm not a fan of Jaco Pastorius at all)
Stu Hamm (I've been using his hybrid technique of classical guitar-style finger picking and tapping to create melodies for quite some time without even knowing him)
A couple of bands that have influences the way I conceive guitar riffs:
Tool, Black Sabbath, Rage Against The Machine, Pantera (I definitely prefer single-note riffs built from scales or modes to standard chugging powerchord metal stuff)