yes you really need to say the use....eg is it constant load as in a led driver?.....or is it likely to have serious transients?......is the duty cycle likely to be very high (might mean a constant off time buck boost is needed),
do you need negative or positive output voltage.
Do you need the output voltage referred to ground, or to vin like it is with many buckboost led drivers.
Is you power level very very low......then use hysteretic type control.
etc etc...
We need
Vin, Vout, Iout and the nature of the load (transients or constant), etc etc.
Big storage caps at the output?