I have the same question as Upgrade00,
Were you able to recover your wallet or others' wallets so far? Would you like to test this with others' wallets?
I know there is nothing you can do to prove your claims, but you can tell us if you are successful or not. I am unsure if many people come to this forum to look for this kind of help. Even if someone looks for your help, I doubt they would believe you. Did you think anything to prove your claims that you are trustworthy and you can help?

You could start a paid service thread with some funds in escrow so members can trust you. For example, you would escrow 0.01 BTC and start recovering a wallet with around the same balance; once you complete the recovery and send the funds to the account owner, you will get your service fee and your escrowed fund. I can think of that when dealing with a newbie forum member. BTW, there are a couple of trusted members who provide escrow services.