There are already a number of threads compiling escrow services on the forum. Most of them aren't updated. The latest of these compilations is probably
tranthidung's. It's also the most recently updated. However, even that list isn't accurate and comprehensive. DarkStar_, for example, is still listed as an active loan provider even if such service is not anymore available. The escrow list as well doesn't include active ones like minerjones or MoparMiningLLC.
Shasan's
compilation is longer, updated a few months ago, but I'm not sure if everyone on the list is still active. I don't know if SebastianJu's escrow services are still available. He's last active in November last year and last posted almost 2 years ago.