A larger voice will of course be heard as a larger voice if it has Singer’s Formant. If it doesn’t have Singer’s Formant it would not be easily heard over a full orchestra regardless of how large a voice it is. Intensity or volume of production has little to do with the ability to be heard over an orchestras.
All male singers produce fundamentals that are mostly within the loudest sounds of the orchestra which extends up to about the 500 KZ range. So, by definition their fundamentals are covered over by the orchestra, They are heard only because, and if, they are able to produce some sonic emphasis in the regions in which the orchestra is weaker and that is in the range of the Singer’ Formant. As listeners we are not aware of all of this but our ears send messages to our brain that correlates the Singer’s Formant to a fundamental and it translates that message such that we hear a loud fundamental as well as lower overtones and recognize not only the pitch but even the vocal quality. It is a wonder of how our minds make reality for us.
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