Hello
I updated the constraints:
- Easy to use for mainstream people
- Without knowledge of BTC
- Payment by credit card / Paypal / international bank wire transfers / Western Union
- Identification with official ID is not an issue (added 12/31)
- Send it straight to a BTC wallet
- No time constraint, it can take seval days with money retention
- Medium amounts (300 to 1000 $)
Ok so I think that Coinbase won as 3 people suggested it

Coinbase.com 3
Circle.com 2
Virwox.com
Localbitcoins 2
Buybitcoins.io 1
Wesellcrypto.com does not work