The list of SKALE Validators can be found here. All of these validators will be available via interface on ConsenSys Activate at the time of token distribution.
SKALE takes great pride in the validators that are on board. In fact, many of the initial validators for SKALE will also be validators for Eth 2.0. The SKALE team cannot recommend any specific validators but recommends that you do due diligence on the set of validators and make your decision based on your analysis.