Yet a lot more time to spend with an every openwheeler in rF2, some haven't even tried yet such as Formula Renault, I guess it is great. My favorites yet are March 761 and Brabham BT44b, I have also spent the most time in them. I also love ASR Jordan 191 and Lotus 99T. Really liked USF2000, but didn't drive much yet. I am also a big fan of sixties racing, but to me they usually seem like sliding point is too low.
Test the EVE or Sparks but go into showroom and then choose the B version which gives front and rear wing. Sure, its very Little wing, lol, but its much more manageable than without. Even Sparks F2B version with longer 4th and 5th gear so you can pump it on the long straights on Belgium ´66 is well Worth a try. The F2 is much easier to drive which is why i recommend it if the EVE F1B is a bit too much. But you gotta test that combo. Remember to hold on to yer Wheel, matey.
One that nobody has mentioned. The Griiip G1, from ASR. It is extremely fun. It is paid (I think 3 euros), but it really is worth it.
For me it's the McLaren M23 and the 68 Spark and Eve cars all of them are insane and they all reward learning to drive them on the edge as did the real cars of those eras