The PM lines have now closed for this category, and the winner is:
mrbouffant 
Here's how the final standings look:
mrbouffant (organ) = 96
Malone (herself) = 63
Car Expert (The Bobbingtons) = 624th: BBTOTW (cello) = 54
5th: noodle (cat) = 43
6th: janexxx (Archie) = 42
7th: ben_walker446 (himself) = 41
8th: Boo Radley (emu) = 40
8th: flute fanatic (quavers) = 40
8th: Scaramouche (herself) = 40
11th: Clariano (night sky) = 32
12th: bobifier (Ascii art pattern) = 31
13th: jazzywench (dancing cat) = 30
14th: sarah-flute (animated smilie) = 29
14th: skylark (herself) = 29
16th: barry-clari (gold star from Cyrilla) = 28
16th: pianoboe (piano, oboe, guitar) = 28
18th: SarahSax1986 (saxophone) = 27
19th: carol*piano (herself) = 26
20th: joyjoy (wacky piano keys) = 25
21st: Binka (cat holding trumpet) = 22
21st: chocolatedog (the chocolate dog itself) = 22
21st: jod (herself) = 22
24th: Oddball (himself) = 21
25th: Miss Ross (herself) = 20
25th: Nocturne (treble clef/quavers) = 20
27th: PianoSecrets-x (dough boy) = 19
28th: Good Intentions (herself) = 16
29th: SaxFan (saxophone) = 15
30th: anacrusis (pine cone) = 14
30th: AnotherPianist (trampolinist) = 14
32nd: fsharpminor (himself playing piano) = 13
32nd: grand choeur (animated organ player) = 13
32nd: La_Chopiniste_ (cake) = 13
35th: Bagpuss (herself) = 12
36th: katyjay (herself playing recorder) = 11
37th: Eleanor (turtle) = 10
38th: Christy212 (tree with orange background) = 9
38th: magicflute (piano keys) = 9
38th: mwl1 (church interior) = 9
38th: Soph15 (Spongebob) = 9
38th: St George ('super-figure' + saxophone) = 9
43rd: BbTenor (instruments/city) = 8
43rd: Choddy (himself) = 8
43rd: dcmbarton (himself) = 8
43rd: LadyOrchestra (dog wearing sunglasses) = 8
43rd: Rosemary (sleeping/podcast poster) = 8
43rd: Rosemary7391 (clarinet pattern) = 8
49th: YetAnotherPianist (brownies) = 7
49th: _rai_ (person) = 7
51st: Chaos_91 (dog) = 6
51st: country girl (cows) = 6
51st: ffliwt (herself with violin) = 6
51st: Schwournes (gingerbread man) = 6
55th: *Pianola* (harpist) = 5
55th: ad_libitum (grand piano) = 5
55th: Cello_forever (3 cellos in forest) = 5
55th: cheeble (herself) = 5
55th: Devil_Fiddler (glass building) = 5
55th: liebe_klavier (nature) = 5
55th: maggiemay (garden) = 5
55th: Reverie (herself) = 5
63rd: Carrie x (blue liquid/solution) = 4
63rd: Saxophonist (saxophone) = 4
63rd: StuMac (himself with 3 others @ Stalybridge) = 4
63rd: thouston (herself) = 4
67th: all ears (archetypical female 'okame') = 3
67th: lizbun (herself) = 3
67th: lucky045 (herself) = 3
70th: Deborah (herself with clarinet) = 2
70th: fiddle chick (girl playing fiddle) = 2
72nd: bassmadmatt (himself playing guitar) = 1
72nd: Talitha (cat) = 1
72nd: Wobby (Muon Cherenkov Ring) = 1
Car Expert