Mozart: Piano Concerto #21, #9, #26, Requiem, symphony #39, #40, overture to Marriage of Figaro, and the opera itself and, the Magic Flute. The french horn concertos, clarinet concerto
Bach: Brandenburg Concertos, Toccata & Fugue in d, Orchestral Suites, Lute Suites. Jesu, Joy of Man’s Desiring.
There is a lot more of the two, but this is all I can think of

BACH WORKS

Vocal Works
Cantata No.4: Christ lag in Todsbanden (Easter Sunday)
Cantata No.80: Ein’ feste Burg ist unser Gott (Reformation Festival)
Cantata No.140: Wachet auf, ruft uns die Stimme (27th Sunday after Trinity)(includes ‘Sleepers Awake’)
Cantata No.147: Herz und Mund und Tat und Leben (Visitation, includes ‘Jesu, Joy of Man’s Desiring’)
Cantata 208: Was mir behagt, ist nur die muntre Jagd!
Passion According to St. Matthew

Keyboard Works

Prelude and Fugue in Eb
Toccata and Fugue in D-
Partita No.1 in Bb
Well-tempered Clavier, Book 1
Well-tempered Clavier, Book 2
Chromatic Fantasia and Fugue in D-
Italian Concerto
Goldberg Variations

Orchestral Works

Brandenburg Concerto No.1 in F
Brandenburg Concerto No.2 in F
Brandenburg Concerto No.3 in G
Brandenburg Concerto No.4 in F
Brandenburg Concerto No.5 in D
Brandenburg Concerto No.6 in Bb
Keyboard Concerto in D-
Violin Concerto in E
Double Concerto in D- for 2 Violins
Orchestral Suite No.2 in B-
Orchestral Suite No.3 in D (includes ‘Air on the G String’)

Chamber Works
Partita No.2 for Solo Violin in D-(Chaccone)

Partita No.3 for Solo Violin in E
Cello Suite No.1 in G

MOZART WORKS

Operas

Così fan tutte
Die Entführung aus dem Serail (The Abduction from the Seraglio)
Die Zauberflöte (The Magic Flute)

Good Movements in “The Magic Flute”
Queen of the Night’s Recitative and Aria: O zittre nicht, mein lieber Sohn!
Queen of the Night’s Aria: Der Hölle Rache kocht in meinem Herzen
Pamina’s Aria: Ach, ich fühl’s, es ist verschwunden
Finale: Papageno, Papagena: Pa pa pa

Don Giovanni

Good Movements in “Don Giovanni”
Aria: Madamina, il catalogo è questo
Aria: Fin ch’han dal vino (’Champagne Aria’)
Canzonetta: Deh vieni alla finestra
Aria: Il mio tesoro

Le nozze di Figaro (The Marriage of Figaro)

Keyboard Works

Piano Sonata No.11 in A
Piano Sonata No.16 in C
Variations on ‘Ah vous dirais-je, Maman’ (Twinkle, Twinkle Little Star)

Symphonies and Concertos

Symphony No.35 in D
Symphony No.38 in D
Symphony No.39 in Eb
Symphony No.40 in G-
Symphony No.41 in C, (Jupiter)
Piano Concerto No.21 in Cmidis
Piano Concerto No.24 in C-
Piano Concerto No.27 in Bb
Violin Concerto No.4 in D
Violin Concerto No.5 in A
Sinfonia concertante in Eb for Violin and Viola
Clarinet Concerto in A
Divertimenti, Serenades, and Cassations
Serenade for Winds in Bb
Serenade in G (Eine Kliene)

Chamber Works

String Quartet No.17 in Bb
String Quartet No.19 in C
Clarinet Quintet in A
Horn Quintet in Eb

Requiem Mass in D
Mass in C, K.317 (’Coronation’)
Mass in C-, K.427 (’Great Mass’)

So you’re looking for a “greates hits” list type o’ thing, eh?

Mozart

Symphonies #40 and #41 “Jupiter” — I think 35, 38 should be added
Overture to “Le Nozze de Figaro”, overture to “Don Giovanni”
Piano concerto in C #21 (with the famous “Elvira Madigan” theme in the second mvt.)
“Eine Kleine Nachtmusik”
Piano sonata K545 “Sonata Facile”
“Lacrimosa” from the Requiem (Ithink the whole thing should be a greatest hit)
“Rondo alla Turka” from the A major sonata K 331

Bach:
The 3rd and 4th Brandenburg conertos
“Jesu Joy of Man’s Desiring”
Prelude #1 from the Well Tempered Clavier Book 1
Prelude and Fugue #2 from the same
Prelude from Cello suite #1
Chaconne from Violin partita #5
Goldberg Variations

Now in my opinion what you should have is a much longer list — but I’m limiting myself to the “greatest hits” category. Others will add things that I overlooked I am sure.

Glinzek

Mozart: Eine Kleine Nachtmusik, Rondo ‘Alla Turca’, 21 piano concerto, Requiem
Bach: St Matthew Paasion, Brandenburg concertos

Well, just hear : “Variation” for piano, something like “Avos mama” sorry…. my spelling