Yes, but ironically the Leman Russ is a design that would have any tank built after 1940 rolling onto its roof and laughing.
Seriously, regardless of its effectiveness in 40k, the Leman Russ is a bulky, overly tall design with overexposed treads, armor that will be weakened by the sponsons by default, and judging by its shape, will have rather limited ammunition capacity. At best, a design like this would be some cheap one-off by some European nation in the 30s that would be blown to bits by properly built Panzers once Blitzkrieg comes around. After WW2 sorts the wheat from the chaff when it comes to tank design, it'd be relegated to another laughable failure.