try this : https://iconscout.com/?referral_code=C5FWCNPRVUC

You can find every icons with different different patterns and colors. Also you can easily customize it. You can download png, svg or esp format so you can do changes as you need for you project.

Best thing is here you get all the icons and illustration so you don't need to find somewhere else.

I personally suggest iconscout. share your views or other site which you think is better.