Since you are interested in Wagner: Siegfried (complete opera recorded 2017), here is a list of other items that you may find interesting.
WAGNER / BEETHOVEN / SCHUMANN / R. STRAUSS
Simon O'Neill (tenor) Terence Dennis (piano)
[ Decca / CD - released 30/Jan/2019 ]
"The New Zealander Simon O'Neill (b 1971) is fast winning international recognition as a leading heldentenor, that rare breed of powerful, heroic tenor voice needed for German romantic opera, especially Richard Wagner." MusicWeb