Excellent choice on the Eroica. Many give that one to Karajan, but Klemperer gets the point across beautifully without rushing through it. Walter also has an amazing 4th, I'd have to agree with that decision, as well as Furtwängler for the 9th (although I prefer the '51 recording with the Bayreuther). Furtwängler is who got me interested in the 8th, and I still haven't found a better interpretation of that (save for a 2010 performance with Haitink and the Chicago Symphony, which is not out on record). As for the 5th, I think Solti, Haitink and Kleiber all rival if not surpass Karajan's. As for Bernstein, I think he does every symphony very well, which is rare in any Beethoven cycle, but none of them extraordinarily.
Thus, my choices:
3- Klemperer, Philharmonia
9- Furtwängler, Bayreuther Festspiele, 1951
8- Furtwängler, BPO
4- Walter, Columbia SO
6- Böhm, VPO
5- Kleiber, BPO; Solti, CSO
2- Ormandy, Philadelphia Orchestra
7- Jochum, BPO
1- Szell, Cleveland Orchestra
Then again, such is the nature of Beethoven's music that it is hard to find a bad recording. Even if the conductor is fifth-rate, the work will still sound good, even if not at its best. (I exclude Roger Norrington from my considerations when I say this, for he intentionally makes his recordings sound bad.)