It's also been a while I've read about these topics, so I'm not sure if Russia also does entropy analysis and fingerprinting differences to block these protocols either.
You may like reading about the new TSPU system in Russia [1], and discussing your issues on [2].
[1] https://censoredplanet.org/tspu
[2] http://ntc.party
You can also co-exist OpenVPN on 443/tcp with a "real" web server. The usual use case for that is getting more value out of a single IP address. Put your pony fan club website up or an Ubuntu default webpage.
Another possibility is to use port knocking to open ports before the OVPN connects.
PPTP is generally believed to be broken so it might be "allowed" because it will be assumed that grabbing and storing the stream will be sufficient for later analysis. Then you put a OpenVPN inside the PPTP tunnel with proper, modern encryption.
... 53/tcp or udp might be worth trying too. 123/udp - ntp, 25/tcp - email! Basically try being weird - it may well work!
Not only that, ISPs now close all connections which look like VPN traffic. I used to have my own OpenVPN server as a window to the free world and now it doesn't work... I wish there was some kind of open standard which doesn't leave a very obvious signature which is easy to detect by ISPs. I don't know if HTTP CONNECT can be hidden from ISPs? I guess I'm going to try Edge after all.