I dont believe there is one type of ideal tenant. I believe there are ideal tenants based on the property & the property manager. Don't put an aspiring math PhD in a basement suite with 7 first year arts students above her who are living away from home for the first time.
It's the overall picture that you need to consider. Who is ideal for that specific property based off all factors. Not just who checks the boxes on a list.
For suited houses I look for younger/ early professionals or folks who are in their last year of schooling prior to beginning their career. If in school, I grab a co-sign. If they've got kids, I'm cautious due to noise transfer. For one place, I target dog owners as it is prime for a makeover soon (flooring and such is showing its age and I'm Maximizing income to bank it for a Reno).
For the apartment condo I've got, pretty much anyone. The building is quiet and the place is nice enough to cover a wide range. No pets, and our building is best suited for older children (or none).
For the non suited house I've got, professionals only. Family is fine there. But income is higher on the list as rent is $2200. Pets are fine, I target that actually and it has a massive yard so I target dog owners. No students here and no first timers. I've actually had some success marketing specifically to divorced / divorcing folks here. Great income, terrible credit, don't want a crappy apartment that stinks of college life and need a couple bedrooms for a kid on weekends or similar. I believe the "newly divorced" niche market is almost entirely unrecognized locally. Those folks are great generally. Only caution with this is the "newly separated and not sure what's going on yet" category... You'll often end up absorbing the ex and then they'll split again and then get back together etc etc or else you'll end up with a notice to vacate after month 3 of a 12 month lease.