As concerns the largest autos... so far the record holders are think different and auto mazar, at around 450 grams for a LED cold grown, heavy nute, insanely manicured plant. the same would give 50 grams in decent compost and 120 grams in great soil if you water it every 2 days in 45 lattitude... i know because ive researched think different alot. Some guy got 40 plants in raised beds and the average was 120g!!!
they dont smell amazing though, pine and musky wood polish smell, although in a few years we should be havin big yielders in every fragrance and appearance. Big devil is the other one i have seen that gets over 1 meter regulary, i think it may be very similar to think different i dunno.