Animated Graph below shows the daily top 10 validators by voting power. We can see that Orion.Money sat on top for most of the time with occasionally overtook by Staking Fund. B-Harvest consistently at rank 3 for the past 60 days.

Graph below shows the daily total voting power for top 10 validators vs total voting power in all validators. Top 10 has around 39-40% voting power for most of the days.

Below are the voting power distribution for 130 validators. Top 10 has 40% and top 3 have almost 20% of total voting power so I believe it is not quite well distributed. For the past 60 days, top 10 percentage holding has decreased a little bit (from 40% to 39%).

Keeping the ecosystem decentralized is very important, so I you wanna participate in keeping the network decentralized, you should redelegate to other validators outside of top 10. Do Kwon also has proposed to stop incentive airdrop to those $LUNA staked at top 10 validators.