I would suggest using Outline (based on Shadowsocks but with easy interface)
Or set up OpenConnect Server on Cisco Anyconnect mode, it is based on HTTPS and it looks exactly as https on the wire
Either way, I agree Shadowsocks is another great option. The more options people have the better.
Outline on the other hand appears to be a service that someone would have to trust and pay for. Commercial VPN providers are a great targets for swooping up large swaths of dissenting citizens. I believe people should stick with tools they can entirely host themselves. Using a VPN provider is probably fine for things like Netflix region selection but very much not for subverting a states control. It's risky enough to pay for a VM. People outside of Iran could contribute VM's for this purpose.
Iranian HTTPS Client with cert installed -> HAProxy Layer 4 TCP listener on a VPS VM -> Squid SSL Bump running on a home router at someones house or business.