I had exactly the same issue last night! managed it with the help of a tyre lever to prise the bead away but still ended up with very sore thumbs! I was getting close to using a flat bladed screw driver but resisted – Just!
Replaced it with a Dirt Wizard which I could not get up tubeless, tried all the usual tricks including getting it seated using a tube and taking that out to finish the tubeless set-up, first time my Bonty Charge pump has failed me. Took it to a mate to use an Aldi special compressor that wouldn’t do it either. Brought it into work and up first time with a proper airline 🙂
First ride tonight with the Dirt Wizard on the back, not sure what to put on the front yet, possibly another..
What tyres are you going for?