Bruckner and Mahler wrote ten each, as did Schubert if you include the lost one! The nearest I can get is that Bruckner wrote 3 in C minor (1,2 and 8- the Apocalytic), but he only wrote 10 if you exclude 9 (incomplete) and include 2 very early ones.
This is all according to my late husband's Oxford Companion to Music, published 1955.
Sorry not to be more helpful