3. Opus nos. 1 and 4, and a single movement work written when he was in his late '30s. All 3 are available on Youtube. And you're right, the first 2 are not original, they sound like pastiches after Beethoven, just like his Symphony.
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The Fantasia, whilst probably the pick of the bunch, is not a sonata.
I don't know that I'd call the sonatas "pastiches" of Beethoven. They are certainly in the Beethovian tradition, which is not the same thing. What I meant by not being very "Wagnerian" was that they do not exhibit the sorts of qualities (in terms of tonality, scale, structure or originality) one would associate with Wagner were one only familiar with him from the "music dramas" written after Rienzi, which would mostly be the case.