Discovering people on Steemit can be tricky although you can use the Hot and Trending pages to see who's doing well. As it grows this may get harder. Fairly early on created Steemwho where you can create a profile with a list of interests. There's still only about 60 people on there, but it's worth a look.
I think the topic list should be expanded, e.g. technology, sport. There's a link to a post where you can suggest them, but it's too old to allow more comments.
I'll keep doing my #followfriday posts with suggestions of interesting people, but more tools like this will be needed. Steemit could be suggesting some based on who you follow and tags you use.
Mine cryptocurrency in the cloud at Eobot, including Steem. You can earn as you chat using WowApp. If you use these links I get a small reward. You can recruit others to do the same.