I voted Boult 1952-1952, especially now that Pristine Classical is releasing the cycle in incredible new remasters.
But that that's a very personal choice based on sentimental and historical reasons, just as much as the excellent performances.
I think I have virtually every available RVW recording available including the most recent ones, but if I were pushed identify a 'recommendation' as per the OP, I'd say:
Tod Handley, with either
Haitink or
Slatkin as a perfectly acceptable substitute. Previn too
P.S. Slatkin was something of a musical anglophile and his
William Walton recordings are fabulous.........