During the NW, "tirailleurs" is referring to a light infantry tactic more than to troops themselves.
For example, a voltigeur officer has to give the ordre "Formez la ligne de tirailleurs" = "Form the line of tirailleurs". Then, any troops can be "tiraileurs" when the ordre is given.
To speak in general for the line (the Guard is very specific), you were right. Voltigeurs are a company in a line infantry bataillon, alongside grenadiers on the left. Chasseurs and carabiniers are troops in the light regiment (la Légère).