Default Custom Rom Compatible With Htc One?

Looking for a compatible rom for an htc one m7wls (sprint) running twrp 2.6.3 I have tried several and cant seem to find any that are compatible. Secondly do I have to flash the unzipped boot.img file that's with the rom after I flash the rom? I have tried viper, beanstalk, android revolution and cant seem to find any to get my phone back up and working again, it has no os on it at the moment. Thanks for all your help any suggestions and help would be awesome