I wouldn't assume that they'll get wider than they do tall, as you can lead them in whatever direction you want with a bit of training. You might consider some bushy pines to fill in a bit of the space. Posting a picture of a big 'Reflexa' (true name of 'Pendula') so you can have an idea of what it can become.

{{gwi:641442}}

Hmm pines, that would give a nice variety of textures. I think the Reflexa looks beautiful, but yes, that may look to silly in the plot I have chosen. Thank you!

libraqueen, as unprof. told you, you can train Picea abies 'Pendula' any way you want. You get an 8 feet tall green plastic covered metal stake from Home Depot / Lowes, and tie the main leader, or any soft branch that can be bent without breaking, to the stake using stretchy plant ties. You train it as high up as you want. When it gets longer than the stake, you can tie small stake to the top part of the tree which is still soft and needs training. Once tree hardens at the bottom, the bottom stake can be removed. This tree is fast growing and you can train it up and then allow it to go horizontal and act like a curtain. I have attached a Google image search result link so you can see the many forms this tree can take. Nice tree, but too many of the same will make it boring. Look at some nice spreading pines. Pinus parvifloras are beautiful. There are large Mugo pines, Umbrella pines. A blue spruce like 'Fat Albert' or southern magnolia like 'Little Gem' (if your hardiness zone allows) or even hollies can create some contrast with the other trees and make it interesting for you to look at.

Here is a link that might be useful: Many forms of Picea abies 'Pendula'

Yeah it would be boring with too many of the same tree in one spot. I was suddenly thinking of using a Mungo Pine because it is quite fluffy and would fill in a little bit of the space. I already have a Magnolia which is in the center, but will not get any more because they bloom for 2 weeks and that's it.
I was under the impression that the 'Pendula' grows slow. If not, then great for me! A 'Fat Albert' is a good idea too, with the blue contrast.

Thank you also for the link. The 'Pendulas' are so interesting and each one is so different from the other.

Picea abies 'Reflexa' aka Pendula common trade name in US
for the most part is very unstable particularly when young.

This one trained on the stake till I couldn't reach the main leader anymore off a 6 ft. ladder and then left to free range. at least 10 years ago. It continues to this day to grow straight on its own. About 20 years old.

{{gwi:641443}}

This one on the stake up to about 4 ft. tall then left to free range. It wandered for awhile but now seems like it has stabilized to grow straight up. About 20 years also. I am now seeing 2 leaders growing and plan on removing one this spring.

{{gwi:641444}}

A great cultivar that can be trained into anything you want it to be.

If you want some width and height you should stake them for height otherwise the one in your photo could be heading towards the street.

Ha Ha! Yeah don't want him in the street. I looked up about staking them to spread out width wise as well as height. I think the trees in your pictures seem similar to the with I was thinking of. I don't want something "formed" or "formal" as my home is a wooded lot.. so I would prefer something a little unruly and different.
The plot here is 30 feet in length.. if I measured correctly, I feel the trees and shrub are spaced enough to grow properly. So if I am understanding correctly, I could stake and train width wise to fill in that extra space a bit so it doesn't seem as vast empty space and I can get my privacy as well without getting more conifers or shrubs to fill the space?