Tis all what you are prepared to accept. Acres of mega bits have been seen in the forum discussing the merits of G scale and the sundry scales that can be used within the Genre. I use Piko wagons on my LGB Rollblocks as SG wagons with the axles shoved out to Gauge 3, but I also use a Piko 2-10-2t that is based on a Standard Gauge (SG) prototype, a few tweaks with centre couplings make it look like a Narrow Metre (NG) Gauge loco. The Piko Kamel is available in SG and NG forms same scale but BoBo and CoCo, I have the NG CoCo one for my Harz setup, but it is clearly under scale however I can live with that.
G scale is a bit of a mess but great if you are a bit selective and use things with sense, 1:32 buildings can make great effects by making your space look bigger with forced perspective if used just a little further back on your line (if you can) but will clearly look odd if next to 1:24 trains.