At my local league, there are a few Metal variants using Dialga and Aegislash, a lot of Raichu/Bats, and I along with a few others use Manectric/Mega Man variants. I use Toad/Manectric/Bats, and there's also MegaMan/Toad/Various healing shenanigans and MegaMan/Yveltal. A few people play Vespiquen/Eeveelutions as well. This is only for Standard, mind you.
Expanded, I was thinking about building Trevenant/Virizion/Sceptile PRC. The only other expanded deck I currently know of is LandoBats with Lucario EX, but we generally don't play expanded at my local league. Well, and the Shiftry deck that just got an article here. Though, my friend is building Mega Ampharos/Eelektrik.
To answer your question, yeah, the metagame does involve non-EX cards. Obviously Raichu gets used in those Raichu decks, Eelektrik is great in expanded with a lot of different cards, and Bats are a great partner to a lot of things. Plus, even in those metal decks, Bronzong and Heatran are used to supplement the EX hitters; heck, in the right circumstance, they're a lot better than those EXs. Vespiquen doesn't even use EXs and it's a great deck. Certain cards are really good; it just depends on how you use them.