There are already few comparison sites, but none of them are perfect. If you combine the information from different sites, you can make an informed decision which validator is the best for you.
++ Shows almost all the details you need and calculates weighted score to rank validators. Score validators get is based on missed blocks in last 5k blocks, min/max fee, amount of delegators and current / min self-delegation.
Not everyone agrees how the score is calculated, but you can easily see where the numbers come from and make your own conclusions.
Shows missed blocks, but only for the last 5000 blocks. No way to see, if the validator had issues earlier. Avoid validators that keep missing blocks regularly.
++ Shows missed blocks and times jailed for last X days and since the beginning.
+ Only site to show correct uptime % and uses the same ranking (app rank) than Crypto.com uses in their mobile app.
+ Show changes each validator has done in last days. For example name changes or fee changes.
Doesn't show self-delegations which is one the most important stats for validators.
+ Shows "Avg Sign %". How many % of blocks validator has signed since the beginning. If this is lower than 99.9%, there has been some quite serious issues earlier. Just installing the updates won't affect this at all anymore. Missing few blocks for a update will still keep this rounded to 100% as the number is higher than 99.995%.
Shows only the basic info in the list, but you can click the validator to see more details.
Not easy to compare anything else than the current commission and missed blocks.
https://explorer.nebkas.ro/validators
+ Just shows the basic info in the main list, but you can click any validator to see the details about delegations and transactions. Much more useful for validator owners than delegators though.
Very hard to compare different validators as need to click the validator to see most of the details.
Site is usually quite slow and opening the validator details takes long time.