1) Bach 2) Bruckner 3) Byrd 4) Couperin 5) Musician 6) Purcell 7) Schweitzer 8) Tallis 1) JS Bach 2) Bach prelude player 3) Cathedral musician 4) Church instrumentalist 5) Church keyboardist 6) Church musician 7) Church musician, often 8) Classical organist 9) Instrumentalist 10) Key player 11) Musician 12) Musician in a loft 13) One may play at a ballpark 14) One playing in church 15) One pulling out all the stops 
An organist is a musician who plays any type of organ. An organist may play solo organ works, play with an ensemble or orchestra, or accompany one or more singers or instrumental soloists. In addition, an organist may accompany congregational hymn-singing and play liturgical music. ==Classical and church organists== The majority of organists, amat...
• (n.) One of the priests who organized or sung in parts. • (n.) One who plays on the organ.
Or'gan·ist noun [ Confer French organiste .] 1. (Mus.) One who plays on the organ. 2. (R. C. Ch.) One of the priests who organized or sung in parts. [ Obsolete]
[n] - a person who plays an organ
noun a person who plays an organ
a person who plays the organ.