None of those are Artoria (Saber).

The one in the yukata and kimono is Okita Souji, nicknamed Sakura Saber, stage 1 and stage 2 ascensions.

The one in the white costume is Nero Claudius (Bride).

The one in the pseudo-Santa getup is Saber Alter.

All of them are from Fate/Grand Order, not Fate/Stay Night.

They're literally in the filenames.

https://fategrandorder.fandom.com/wiki/Okita_S%C5%8Dji
https://fategrandorder.fandom.com/wiki/Nero_Claudius_(Bride)
https://fategrandorder.fandom.com/wiki/Artoria_Pendragon_(Santa_Alter)

Base +8, Jitsu2 +31, roxifas +6, DJ_Puchuu +17, insanityprime +2, nunyabiz888 +7

pic 1-6 Okita Souji - Stage 2
pic 7-11 Okita Souji - Stage 1
pic 12-15 Nero Claudius (Bride)
pic 16-21 Saber (Santa Alter) - Stage 1-3

Base +20