Most, if not all, hotels that offer free breakfast don't have over-the-top resort amenities, like lazy rivers. I don't know of any.
For a nice property, close to Disney with no resort or parking fees, I like Springhill Suites Flamingo Crossings. They have a pool, but no lazy river.
If you want a lazy river, the Hilton Bonnet Creek/Waldorf Astoria and the Wyndham Grand/Wyndham Bonnet Creek resorts have them. No free breakfast. Wyndham Bonnet Creek is a timeshare resort that is often the best value.
Buena Vista Palace has a lazy river. It's part of the Disney Springs hotels, so you're eligible for EMH and 60 day FP reservations. I haven't stayed there yet, but we're looking forward to staying there in April. We picked it because of the pool, lazy river, and walking distance to Disney Springs. No free breakfast.