You can get breathtaking templates on these websites, even i have used some of them:
1.http://www.mashup-template.com/ (It may show you this site is not secure but
it's secure, it just doesn't have SSL security and that is only needed for
transactions you can read more here :
https://www.cloudflare.com/en-in/learning/ssl/what-is-ssl/)
2.https://www.creative-tim.com/templates (This site too has quite good templates
. Some are paid but worth you can use for free too.)
3.https://mailchimp.com/landers/templates/?gclid=Cj0KCQiAnaeNBhCUARIsABEee8WRftr_njLdPfm0AsLfyLPvDSaqQAxSBjiUqcBvFiC-7NDy9_aOu9saApv7EALw_wcB&gclsrc=aw.ds
You can get good templates here as well as you can use this site to host your own
website too.