I'm not going to say most beautiful or anything like that but certainly a favorite:

 

Air on a G String.

 

 

+1

KV 466--have you heard Tilman Hoppstock's guitar transcription of BWV 914? I have his recording and score...the last fugue is brutally hard to play!

 

 

This piece is the holiest music I've ever listened to. The entire thing is beautiful, but you must at least listen to 12:00-13:10:

 

I really love this excerpt from St. John Passion, those who think Bach can't move, watch out!

 

I'll go with neither vocal nor keyboard - the double Violin Concerto. Here is the wonderfully beautiful second movement -

 

YEP! SECONDED! This movement was composed as a tribute to his first wife who had died suddenly about the time the concerto was written. The two violin lines intertwine as one voice and represent the love Bach and his wife shared. Beautiful and heartbreaking.

 

Richter's reflective manner of playing the Prelude BWV 873 is so beautiful - I am glad you posted it - I have the GGould WTC complete and his playing of this prelude is much faster. Richter's is haunted or haunting...though Richter can be taken with speed and that's for sure. I've never heard the last movement of the Beethoven Appassionata F minor Sonata played faster by anyone else.

 

This is surely one of Bach's most "beautiful" moments.

I probably turn to the cantatas more than anywhere else for a wealth of such brilliance that one could literally spend years there alone. Along with the deservedly famous cantatas 140 and 147, my favorites include the magnificent cantatas Bach wrote for alto soloists (BWV 35, 169, & 170):

 

The final movement of St. Matthew Passion for me.

 

This:

Followed by this:

Then a little of this:

And all the ones mentioned above and many many many more. I could not stop....

 

I'd have to choose Cantata 82 "Ich habe genug."

 

Another beautiful one from Bach. Oboe Concerto in D Minor Second Movement.

 

Playing and listening to these gavottes was an extraordinary experience of Beauty to me:

 

 

Another non-organ version!

 

oops...duplicated!

 

 

Well, since you introduced electronic music, I have to post this.

View attachment Wendy Carlos - Switched On Bach - 01 - Track 1.mp3

Bach's Sinfonia to Cantata No. 29 by Wendy Carlos.

 

I was looking at all of the posts here and noticed that there's all of these great pieces posted with very little overlap. That's one thing I love about Bach, he has soo many great pieces that it's hard to limit him to one lol.

I was kind of surprised not to see his Partita #2 on here yet, that's probably my favorite! Here's the chaconne.

I've also been getting really into his cantata BWV 199 recently, here's my favorite section of it:

 

The first Aria of BWV 210 (yes, a SECULAR cantata). Skip to 0:54 for the start of the movement:

 

Bach rocks, but I suck trying to attach a video.

 

Jesu, Joy of Man's Desiring

 

Welcome to the forum :tiphat: