In theory, all chargers will work with all suppliers on a very basic level - what you lose out on are more advanced features - for example, the Ohme Home Pro would vary charging rates as well as just 'charging or not charging' when it was directly integrated - so it might charge for seven hours at 2kW rather than two hours at 7kW if that's what the system deemed best - since it lost Ovo compatibility, it can only do 7kW or nothing.
The widest compatibility of the most features is likely to come from the biggest brands - myenergi Zappi, Hypervolt 3 etc.
Octopus integration is probably the main one to pay attention to, as it's the intelligent dynamic charging tariffs that need the smarts - stuff that's just basic 'cheap overnight' can often be done with relatively simple scheduling.