>>4045291yeah an f2 or lower 35mm would be ideal but would still be very bulky, you won't find a compact lens with an aperture that wide
pic related is the fujifilm 35mm prime, since it is a crop sensor it will give you a nice bit more reach than a 35mm on a full frame
I would recommend that setup (used xt2 or xt20 with 35mm) if you think that you don't mind something that size