well, for starters, i've got these few in mind for giantess ideas:
-princess tippi (ribbitking), having just grown huge and being confused and unaware of her situation, perhaps with a pov shot of her about to step on the viewer (barefoot and shoe alts if possible)
https://i.imgur.com/scRF3Ez.jpg
https://youtu.be/6PaDgjy7xlo?t=267 (4:27)
https://i.ytimg.com/vi/dOcz6bSsw_o/mqdefault.jpg
-marsa (rakugakids) as a giantess, with a pov shot of her about to step down on an opponent character from the game she's from (barefoot and sock alts if possible)
https://cdn.discordapp.com/attachments/486670874074808320/803447424739573790/Marsa_Yes.png
https://youtu.be/VddVivrkXxk?t=544 (9:04)
https://youtu.be/EUzTrtLQfao?t=419 (6:59)
https://www.spriters-resource.com/nintendo_64/rakugakids/sheet/41764/
-alt (pop'n music) dancing around while huge and singing for all the tiny people below as they cheer for her
https://64.media.tumblr.com/06502f41458641ebd878533480cd81f3/tumblr_oo4bcpXYaI1sid013o1_1280.png https://static.wikia.nocookie.net/popnmusic/images/0/0e/0_1_ANGEL_Jacket.PNG/revision/latest?cb=20150112225032
https://static.wikia.nocookie.net/popnmusic/images/2/2d/Alt.png/revision/latest?cb=20150525041138
-grapefruit cookie (cookie run), racing a helicopter through the streets of a tiny city as she skates around while being huge, not really watching what's in her path
https://www.youtube.com/watch?v=0BV7YfvoBQk (0:38)
https://cookierun.fandom.com/wiki/Grapefruit_Cookie/OvenBreak
https://i.pinimg.com/736x/42/ef/bf/42efbf1a16b394b8d9ac9b734a6d087b.jpg
-luna (mighty milky way) finally fulfilling her wish of destroying the earth, by crushing it between her soles as an even larger giantess than she normally is
https://nintendoeverything.com/wp-content/gallery/mighty-milky-way_2/mmw-1.png
https://art.ngfiles.com/images/752000/752188_dookspunk_dook-sketch-mighty-milky-mech.png?f1545471496