Apparently my favorite character was a tortieshell tom

black and orange means tortoiseshell--most true (non-calico) tortoiseshells appear to have brown because the black and orange mottle together, but the options are what you've said but more specifically

(also a black tabby is a brown tabby so that would add brown)

XXY - black on one X, red on the other; Y does not carry color
chimera - essentially two cats squished into one

so yes Ripplestar was a tortie tom--but it seems likely in his case that he was a chimera, because he seems to have very defined patches despite not having any white