re: Best Current Rock Band?

Actually, wikipedia has a pretty solid definition for a term that is inherently ephemeral:

quote:

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Indie rock, derived from "independent", describes the small and relatively low-budget labels on which it is released and the do-it-yourself attitude of the bands and artists involved. Although distribution deals are often struck with major corporate companies, these labels and the bands they host have attempted to retain their autonomy, leaving them free to explore sounds, emotions and subjects of limited appeal to large, mainstream audiences.[1] The influences and styles of the artists has been extremely diverse, including punk, psychedelia, rock and country.[2] The terms alternative rock and indie rock were used interchangeably in the 1980s, but after many alternative bands followed Nirvana into the mainstream in the early 1990s it began to be used to distinguish those bands, working in a variety of styles, that did not pursue or achieve commercial success.[1]

Allmusic identifies indie rock as including a number of styles that are: "too sensitive and melancholy; too soft and delicate; too dreamy and hypnotic; too personal and intimately revealing in its lyrics; too low-fidelity and low-budget in its production; too angular in its melodies and riffs; too raw, skronky and abrasive, wrapped in too many sheets of Sonic Youth/Dinosaur Jr./Pixies/Jesus & Mary Chain-style guitar noise; too oblique and fractured in its song structures; too influenced by experimental or otherwise unpopular musical styles." Linked by an ethos more than a musical approach, the indie rock movement encompassed a wide range of styles, from hard-edged, grunge-influenced bands, through do-it-yourself experimental bands like Pavement, to punk-folk singers such as Ani DiFranco.[3] Many countries have developed an extensive local indie scene, flourishing with bands with enough popularity to survive inside the respective country, but virtually unknown outside them.[4]

Indie rock has been identified as a reaction against the "macho" culture that developed in alternative rock in the aftermath of Nirvana's success.[1] It has been noted that indie rock has a relatively high proportion of female artists compared with preceding rock genres, a tendency exemplified by the development of the feminist-informed Riot Grrrl music of acts like Bikini Kill, Bratmobile, 7 Year Bitch, Team Dresch and Huggy Bear.[5]

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Not perfect, but it's a bit more than "not on a major label". there is an aesthetic. A better term than indie rock might be "post-punk".