[Rockdrigo]

Based on your ratings/charts, here's some (I don't have a complete 60's chart either):
Silver Apples - Silver Apples (a more electric The Velvet Underground) https://www.besteveralbums.com/thechart.php?a=3048
Os Mutantes - Os Mutantes (like The Beatles and Frank Zappa) https://www.besteveralbums.com/thechart.php?a=3114
Moacir Santos - Coisas (jazzy/Brazilian combination like the Getz/Gilberto album, not that unlike Miles Davis) https://www.besteveralbums.com/thechart.php?a=44348
Scott Walker - Scott 4 (lush, like The Zombies) https://www.besteveralbums.com/thechart.php?a=246
Gal Costa - Gal (like the more acid moments of Jimi Hendrix and early Pink Floyd) https://www.besteveralbums.com/thechart.php?a=22673

I don't think we can see eye to eye on the 2000's chart, so not much to recommend here:
The Go! Team - Thunder, Lightning, Strike (indie band with a hip-hop sounding production) https://www.besteveralbums.com/thechart.php?a=5580
Rodrigo y Gabriela - Rodrigo y Gabriela (acoustic instrumental rock with a flamenco tinge and covers of Orion and Stairway To Heaven) https://www.besteveralbums.com/thechart.php?a=2954
Extremoduro - La Ley Innata (symphonic/prog hard rock full of leitmotivs, you may want to get a translation of the beautiful lyrics) https://www.besteveralbums.com/thechart.php?a=6718

[LedZep]

The United States Of America - The United States Of America (1968.)
The Wozard of Iz - Mort Garson (1968.)
The Zodiac: Cosmic Sounds - Mort Garson (1967.)
Forest - Forest (1969.)
The Songs Of Leonard Cohen - Leonard Cohen (1967.)
Duke Ellington & John Coltrane - Duke Ellington & John Coltrane (1962.)
The Black Saint and the Sinner Lady - Charles Mingus (1963.)
The Sketches Of Spain - Miles Davis (1960.)
Five Leaves Left - Nick Drake (1969.)
Clouds - Joni Mitchell (1969.)
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Overall chart
Fake overall chart

2020s

[kickerofelves]

Based on some of the stuff in your overall chart (Flaming Lips, the clash, yes) these might be worth a punt.
They are both almost entirely unknown.


Making Music So You Don't Have To by Fred


Pale Young Gentlemen by Pale Young Gentlemen

[Tha1ChiefRocka]

Here are some for the 00's


Who Will Cut Our Hair When We're Gone? by The Unicorns


The Trials Of Van Occupanther by Midlake


Hell Hath No Fury by Clipse


Crystal Gazing Luck Amazing by Compulsive Gamblers

[Viibes]

A few of my favourites that I didn't see on your 00's chart are:

Turn of the Bright Lights by Interpol (their follow-up, Evil, is also really good)

Transatlanticism by Death Cab for Cutie

Neon Bible by Arcade Fire

Era Vulgaris by Queens of the Stone Age

Elephant by The White Stripes

Sam's Town, Sawdust, and Day & Age by The Killers

You already have most of these artists on your chart, so you likely may have listened to them already, but if you haven't, maybe you'll enjoy them!

[Daydreamer]

I find these albums represent the colofrul nature of the 60's the best:


Forever Changes by Love


Odessey And Oracle by The Zombies


Disraeli Gears by Cream


Magical Mystery Tour by The Beatles
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All time

2000's
1990's
1980's
1970's
1960's