Well, you got your answer on what mixe to use, and obviously, I will recommend Chipmixer also for all the above things posted, but it will be nice of you to have reverse feedback on this so others could avoid this from the start.
Which were those wallets (or exchanges) that warned you that your funds are coming from gambling sites and that you risk having your account frozen or even losing your BTC? Just as there are solutions to bypass such restrictions it would be better if everybody would be avoiding services like this in the first place, making them go bankrupt, and then maybe he rests will understand the message.
2 or 3 hops won't solve anything, the source at the end of the chain for all those coins' first input is still the gambling website, even the crappies chain analysis tool will still flag it, what OP needs to do is break the link between these funds.