Gravity has very strict rules and as others have said, your ideas are impossible.
It is possible, though it's rare, to have 2 planets sharing an orbit. See here, but never 3. Earth and the mars sized Theia are thought to have shared an orbit for a time. But co-orbitals work best if they're not pulled about by neighboring planets so you'd want those to planets to have lots of space on both sides. Your larger planet on the inside of those two and not far away. That's also wouldn't work.
The co-orbitals has to be at specific orbital distance too, which means, no eclipses and just a dot in the sky. Not very interesting. A permanent morning star for one, a permanent evening star for the other.
There's no way to do what you propose with 4 planets.
The most impressive planet viewed from another planet is Earth, viewed from Venus, though Venus has clouds so it's a terrible planet for star gazing, but if you could see stars from Venus, Earth would look quite impressive.
If you want an interesting visual with 2 planets, where they pass relatively close and perhaps have the occasional eclipse, try something like this. Two planets can share similar orbits and swing past each other every few years. That's perhaps not stable on the scale of hundreds of millions of years either, but it's almost arguable.
Two planets orbiting around each other is possible too, like the Earth-Moon system. That's rare that two planets would do that, but theoretically possible. Both planets would have large tides though and you could have fairly regular eclipses.
The problem with 3 or more is, you can't have 3 planet sized objects in relatively close orbits. There's too much instability with three. Two kind of works though, but the 3rd would need some sizable distance.
@JDługosz you mention L3 and L4, the only stable Lagrange points are L4 and L5. You can have a 2 planet system 60 degrees apart from each other, the planet that's ahead is in L4 to the planet that's behind and the planet that's behind is L5 to the planet that's ahead. This is stable provided there are no other near-by planets and provided that the Sun they both orbit is measurably larger than the 2 planets.
If you add a 3rd planet and all 3 are equal sized, then the first and last planet are in L4 and L5 to the center planet, but they are 120 degrees apart from each other and that's the problem, if they're both equal size to the center planet, they would attract each other at 120 degrees and the saddle points would both become unstable. You can only have objects in both L4 and L5 if they are both comparatively small, or you can have 2 comparatively large objects, but not a 3rd. (I looked, I couldn't find a reference to back this up, and I can't do the math, but I know it to be true and it's logically consistant. The Trojan saddle is quite narrow and the two fairly large objects at 120 degrees from each other in the same orbit would gravitationally attract each other.
