1) Big Star
2) Cheap Trick
3) Nick Lowe (don't remember the name of his band!)
4) Romantics
5) The Pretenders

Okay, throw out the 3 member thing. I can think of a couple of good solo artists like Marshall Crenshaw and Dave Edmunds that should make somebody's list. And I think the Foos may have 4 members at some times (especially on tour).

Looks like this thread has disappeared but what the hey.

1. Badfinger
2. Big Star
3. Elvis Costello and the Attractions
4. the Paul Collins Beat
5. The Muffs

A Little Music History for you:
Technically "power pop" is branch of Rock that stems originally from The Beatles. While the Beatles aren't considered a power pop act, the bands they've influenced create the basis for the genre. While Badfinger (produced by the Beatles), Big Star (and Eric Carmen's solo work) and the Bay City Rollers took the powerpop genre to where it came to be called "bubblegum" , along came the most influential Power Pop band ever Cheap Trick. CT was one of the first bands to dip into the newly developing scene known as punk or new wave and harness that energy(although modern punker enthusiasts would poop on that idea...probably because of their massive 70's success...or maybe because Robin Zander was/is just so pretty).

The late 70's and the further popular growth of underground rock sound brought on acts such as The Nerves, The Plimsouls, The Paul Collins Beat, . The invention of MTV helped some New Wave Powerpop(tommy tutone, eddy money, Greg Kihn, The Romantics) acts but the massive growth of Heavy Metal pushed the power pop genre back into the underground. While the rest of the 80's underground became dominated by college radio acts such as the cure, REM, and the like, The Smithereens were able, with their crafty songwriting, to bring strong elements of traditional power pop back to the headlines.

The 90's and the popularty of punks acts like Nirvana created a resurgence to guitar based, non metal rock. As this became the grunge era, it also gave rise to west coast bands who grew up with the likes of the LA new wave bands like the plimsouls and their types. Bands such as The Muffs took that big guitar sound and chord progressions of their youth and got alot of mileage during the mid 90's which was followed by Weezers first album. With the consolidation of the record industry in the late 90's. Many of these acts found themselves lost in the shuffle of the emergence of Green Day, Blink 182 and the parade of knockoffs that continues to this day. Some of the above listed bands like The Muffs and even Cheap Trickcontinue to record without national fanfare, releasing music on Idie labels and staying regional instead of knocking themselves out touring for a modest following.

I find some postings here interesting as there is confusion about the defintion of Power Pop. Power Pop is not Powerful pop, just as garage rock is not bands that play in their garage. The Police aren't considered a power pop band. Neither is Cream. Nor the Foo Fighters. The Smithers and the Romantics...absolutely great listings. You can hear more power pop acts that you've never heard on rhino comps such as "The Children Of Nuggets" and the "DIY-power pop".

1.teenage fanclub
2.mayflies usa
3.superdrag
4.posies
5.the who