Some folks like the sculpted bases and others want more of a general environment. I am flexible
Asgard Rising, there are over 1000 bases in this pack
many have multiple sizes, things can be adjusted in size to fit what is needed
Another big pack, this time by SolGood Creations. Themed for different environments, provide some very scenic and epic style bases.
Below are some smaller niche packs or sets
Ice hero bases - https://www.myminifactory.com/object/3d-print-ice-hero-bases-toppers-268073
Eastern/feudal/Asian Atmosphere -
mixed - https://www.myminifactory.com/object/3d-print-asian-atmosphere-base-pack-4pcs-249168
Bamboo Forest - https://www.myminifactory.com/object/3d-print-bamboo-forest-base-pack-4pcs-212256
Aztec ruins- https://www.myminifactory.com/object/3d-print-aztec-ruins-base-set-pre-supported-208244
Sewers - https://www.myminifactory.com/object/3d-print-sewers-base-toppers-218391
Beach - https://www.myminifactory.com/object/3d-print-shell-and-water-bases-4-pack-172384
Steampunk - https://www.myminifactory.com/object/3d-print-steampunk-bases-186171
A more generic set of asorted bases - https://www.myminifactory.com/object/3d-print-bases-pack-1-210666