Tauros is still very good in RBY Stadium mode, and substitute replaces hyper beam for its final moveslot. For this reason, it can be a bit harder to use but it is still very dangerous, especially if you can set up substitute at the right time.
The formula for a standard RBY team is "lead+big 4+filler". The lead pokemon is usually Starmie, Alakazam, Jynx, or Gengar, and less frequently Jolteon or Exeggutor. The big 4 are the S rank pokemon of the tier and they are Chansey, Exeggutor, Snorlax, and Tauros. Finally, the filler pokemon is what the last moveslot is dedicated to and is usually either Lapras, Zapdos, Alakazam (if it isn't the lead), Starmie (if it isn't the lead), Slowbro, Golem/Rhydon, Jolteon (if it isn't the lead), or Cloyster. The filler pokemon usually compliments whatever lead pokemon you chose and what movesets you gave your big 4 pokemon. People typically consider Golem to be better than Rhydon for standard teams since it has explosion, but Rhydon is also pretty good since it has a noticeable improvement in attack and very slightly higher bulk.
I would think of RBY teambuilding in terms of that formula, and not by the number of normals and psychics that are on your team.
However, there are some creative teams that don't follow that formula of course and can still be very viable (Ex: Alakazam, Chansey, Exeggutor, Rhydon, Slowbro, and Tauros), but they tend to be harder to use and have some gaps that the standard teams don't possess.