Hey! So happy to find this little thread here, I've got a few things I could tell ya!
So, there are actually multiple different worlds with different avatars to choose from. If you want Shinji, Rei, etc. Use the Spanish Geofront and "Basic Evangelion Avatar World" servers, those ones have custom emotes (and gestures in terms of the Basic Evangelion ones.) Just search "Evan" in the world search bar and you'll find those.) My recommendation is to take a look at some of the 3rd-Party VRChat world webpages (most notably https://en.vrcw.net
none of these have any virus or other stupid things on them) and see if you can find any good ones. You can find lots of defunct, old, removed worlds that are pretty cool as well. The rest of the Evangelion Worlds (minus the one with the weird Russian thumbnail thing, that's a community lab though) has some good Eva Avatars as well (though those aren't really my thing, so I don't use those.)
I myself am currently trying to figure out how to make decent VRChat avatars and maybe make some of my own Evangelion VRChat avatars, either that or I'll just commission someone to make a few (really looking for a good Shinji avatar.)
Anywho, hope this helps!