I'd probably rather face the Keres than the Richter-Rauzer; every time I think of taking up the Classical the R-R scares me away.

You might consider using a Taimanov move order to get a Scheveningen: 1.e4 c5 2.Nf3 e6 3.d4 cd 4.Nxd4 Nc6.  Now if 5.Nc3 d6 6.g4 doesn't make as much sense when you can play some combination of ...Nxd4 and ...Nge7-c6.  Unfortunately you'll have to deal with 5.Nb5; something to think about, though.  Another drawback is that you can't play the ...Na6-c5 lines against the Sozin (6.Bc4, 7.Bb3).  Chess is full of trade-offs.

On the other hand, if you like the Scheveningen and there is only one line giving you headaches, there is a lot to be said for buying some material on that variation, doing a lot of work, and "out booking" your opponent.  Just make sure you understand the theory and aren't only memorizing lines.

If you want to play the Classical you should have a good weapon vs. Richter-Rauzer. If you manage to do this, you'll have a great defence against 1.e4. Good luck  ...There are a few topics here if you are looking for ideas.
I supose that the R-R is the Keres attack of the classical, every opening choice has its problems.