All of them. Lara Croft and her pyramid tits, Pink Ranger (Kimberly?), April O'Neil with her busty...suit? I don't know what fuck she's wearing, actually.
Can't forget Mimi, Misty, and Sakura from Digimon/Pokemon/Card Captors.
I'm not a furry but early boners popped for basically any female form. So, that girl rabbit from Space Jam and Sally Acorn/Amy from Sonic were looking alright. Even fucking Candy Kong roused my interest lmao. I think the last furry girl I liked was Krystal from Star Fox. That one's a bit shameful and even I knew it was weird since I wasn't a little kid anymore.