Under ~25mm you can get away with 1.25" eyepieces perfectly well. They are often cheaper. Some dual-barrel eyepieces exist, but for way too much what it's worth.
http://blog.pixelgiraffe.com/wp-content/uploads/2016/11/dobson8eyepieces1200.png
Planets, Depending on your budget,
As for an overview,
In-between: Over 10mm Plössl can work. A 15mm gold-line isn't overly great but still works fine in F/6 telescopes. ~$20, $30 at Amazon (The 6mm isn't available there anymore but the other focal lengths)