I know I've beaten this one to death, but a pair of small knipex cobras along with an sak definitely doesn't weigh down the pants, and pairs nicely with another folder.
Knipex pliers in
dress pants pockets? Hard pass.
Gerber Dime isn't horrible, I had one of them for quite a few years and it's held up well. They're cheap so if you take a chance it won't be a big loss if you don't like it.
Not as good as a Leatherman squirt but I'd say comparable to a SOG.
Agreed on all counts. The Dime isn't as good quality as the small Leathermans, but it is fair. Definitely pocket-friendly, and they break in nicely.
Here another vote for the Spirit. It's nice and compact and carries light. Another non-LM option for a smaller multitool would be the Gerber MP400. I also have some multitools which are even smaller, but consider those suitable only for light duty work.
I have an MP400, but the tips of its pliers protrude from the handles when retracted; it would tear up dress pants pockets in short order. It MIGHT be an option if you ground the tips down to make it a blunt nose?
The blade grind is so steep that I find it nearly impossible to sharpen. The nail nick is on the wrong side of the blade. Somehow though, it's a good little MT anyhow.
I have an original SwissTool and also a Spirit X. The Spirit X is indeed smaller, lighter, and more pocket-friendly than the original SwissTool, but to me, it would still feel like quite a load in dress pants pocket. The weight is very dense, as there's no plastic. If you can handle this weight and size class, this is the obvious choice. It is by far my favorite plier-based MT. The only thing it lacks is an integrated bit driver.
In the size class between the Spirit X and Dime is the Leatherman Juice S2. Bigger than a SAK pliers, but smaller than something like a Spirit X or MP400. Quality is excellent. Shame you ruled out LM. They have some models just a smidge bigger than the Dime that are better quality too...
Here's an off-the-wall option: Victorinox CyberTool M. It has an excellent bit driver, the SAK pliers, plus the other usual great SAK tools, including the Plus scale tools. I found the second set of bits for the Swisschamp XAVT on ebay so I could have Torx bits for it, and now I can use it to work on my tactical knives! Better in the pocket than a Spirit.