I been doing some research on masternodes lately and apart from the obvious ones(DASH, PIVX) these 2 stood out to me.

FantasyGold- working product in the fantasy sports industry, also hosting a DragonBall FighterZ esports contest in Las Vegas with future Esport tournaments. The development team seem very active in their Discord channel to any question ask. It also had a low total supply, the daily volume did seem a bit low the day I looked. They have been going for a while but had recently done a rebrand swap from DFScoin to FGC for the masternode. The ROI looked good to me. https://masternodes.online/currencies/FGC/

Rebellious- Very large community that are changing from Token to their own blockchain. This article off their website probably will explain it better then I can https://www.rebellious.io/masternodes/
Their was no ICO for this one, they gave the community free tokens in the hope the community will drive the token. It has also been around for a while now and has grown in leaps and bounds. High volume on Bit-z exchange.