I would say that Exeggutor, Chansey and Tauros are all in a standard team.
The other 3 is a choice between Alakazam, Zapdos, Golem/Rhydon, Snorlax, Lapras and Starmie.
Obviously there are other alternatives (Persian and Gengar for example), but I think most combinations of the 10 above could be considered as a 'standard' team. Having said that, not all combinations of those above is standard, for example a team with both Golem and Rhydon. Personally I use neither!