I 100% relate to this! It gets really old being the only one who plays their character instead of themselves, and I try to help others be motivated to engage, but lots of times it doesn’t work out and it feels like I’m a frontman to the whole group when that’s really not what I want at all.
I actually really appreciate the basic intro to FATE core because of this. When I led a one-off it’s what I started all the players with before they created characters, and I feel like it helped them become more engaged. The rules of your character in FATE Core are (my summary):
Your characters are proactive, competent, and dramatic
you are an active participant in storytelling - everything needs to make sense - narrate your rolls and justify [using inspiration]
Fighting isn't the best outcome many times, look for creative solutions as you can