If one hand deployment is what you are looking for with outside deployment...I would suggest the following in no given order.
1. Buck X-Tract (I would suggest the X-Tract Fin for the added scissors over the can opener, but they all work wonderfully one handed)
2. SOG PowerAssist for its two assisted opening knife blades which make OHO very easy for the blades.
3. Gerber has a whole line of sliding pliers based MTs that are perfect for OHO of the pliers. Take a look at the Gerber Flik and Freehand for those outside opening tools. Mind you, some of the tools are a bit small on the Flik, but still useable.
4. Leatherman Wave, Surge, Charge, Skeletool/Freestyle, and the Juice series.
5. Victorinox Swiss Tool and Spirit. Both feature outside opening tools.
Frankly, do take a look at the Buck X-Tract. That is a tool that is all one hand accessible. The knife is huge, the pliers are not that small. You get two drivers, a flat and a Phillips, and with the fin, you get a pair of very useful scissors along with a separate diamond file plate for hooks or what not.