"What has been surprisingly hard is finding a video or pic with with a piko engine pulling LGB cars so at the very least I can have a visual idea."
HI. I have a couple of videos to offer to you. The first one shows my Piko 0-6-0 Camelback locomotive hauling a mixed consist of Lionel, Bachmann, and LGB cars with a Piko SP Drovers' Caboose bringing up the rear:
Video 2 shows my LGB 2-6-0 locomotive with 2 USA Trains D&RGW shorty passenger cars, my LGB Queen Mary Series #4175 Drovers' Caboose,with the Piko Drovers' Caboose bringing up the rear once again:
Note that the Piko Drovers' Caboose is approximately 1.5 inches shorter than the LGB version is. But it is the same height.
Hope this helps!