Staying away from CO2 and PCPs, there's the Avanti/Daisy 747. It's the hands down favorite for the IHMSA-Air production class. Then if you're into air guns that look like firearms then there's the Beeman P-3.
If price is a problem go with the Daisy 717 or the Marksman 2004.
If price isn't a problem then the Izh 46M or even the FWB 103.
For hunting, you'll need to limit your range to 10m since these are all rather low power, ~4fpe.
How's that for a starter list? Others can comment. Your milage may vary.
Alf