a ZT 550 will fit the bill for everything but the length. Honestly I would recommend carrying 2 lighterweight durable knives.
I usually carry a primary and a secondary EDC. my primary is in pocket on a pocket clip and my secondary is either on a pocket clip in my waistband or on another pocket like my back pocket. If you are okay with something like this then I would carry a Spyderco delica and a cold steel mini recon 1. both can take a beating but the delica will most likely break before the recon. That is not a knock on the delica however, it is an observation that the delica is FRN and thinner and therefore is more likely to break with hard use. I personally carry Primary: a ZT 0550, 0560, Brous reloader or I have in the past carried a LW manix 2. Then secondary Either a OKC rat 1, Cold steel Recon 1, Spyderco waved endura, or in the past a ritter mini grip.
ALL of these are great knives. The 2 that I would say I would have no problem putting up to almost any EDC task are the ZT 0550(or 0560 If I carried it more) and the cold steel recon 1(endura is a close 2nd)
that being said my EDC knives usually see use of opening envelopes, breaking down boxes, cutting clamshell packaging, and the occasional oddjob.
Keep in mind that these are all just MY personal experience and opinions, and yours may differ due to personal preference and that's to be expected.
Good luck in the search for a great EDC work knife and let us know what you get!
all the best,
-Nick