The organ companies I played organs made by were Johannus Organs (THE NETHERLANDS), Allen Organ Company (USA) Rodgers Instruments (USA). I have had the opportunity 11/11/2017 meet Bob Grey. A retired Saint Louis Cardinals Baseball Organist for 12 years. I met him at Midwest Music Conservatory in Clarkson Valley, in the Saint Louis County.
"In The Heart Of The Netherlands."
This organ company way founded in Europe, it is known all over the world for the worlds best digital organ sound quality. The smallest of which is the Johannus ONE. The widest not in hight is the Johannas Monarch V (Five). The tallest is the Johannus Live.
Rodgers, Allen, and Johannus organs playing different songs. A Rodgers Infinity 484 (Video, Copyright to Rodgers Instruments), A Johannus Opus 250 (Video, Copyright to Johannus Organs) and Allen Organs doing the Trumpet Voluntary and a Fesival Christmas Concert (Both Copyright to their original owners, the videos were not uploaded by Allen. Copyright to Allen for the organs).
See Rodgers at https://www.RodgersInstruments.com/
See Johannus at http://www.Johannus.com/en-us
See Allen at https://www.AllenOrgan.com