Classical composers, symphonies

I thought I would reach out to Audiogon fans of classical music for some help, having seen the numerous posts in the afficionados thread.

I am a big fan of large orchestral works like symphonies, particularly of Rachmaninoff, Tchaikovsky, V Williams, Wagner, Mahler, Brahms, and Bruckner(Romantic).

If you could recommend one or more additional composers to explore that are similar, who would you recommend?

Thanks in advance.