The XX rods are flat out awesome and compare very well sensitivity wise to my St Croix Legend Xtreme rods.
X2 on what Kickerfish1 said about contacting Gary at the Tackle Trap for help, he will absolutely steer you in the correct direction.
That said here's my two cents, for the weight jigs you primarily throw, and especially if you throw them into any cover they will recommend the Perfect Pitch. I've not handled it but talked to Gary about it quite a bit. I e been told it is very well balanced and has the most traditionally fast taper of any of the XX lineup and is the best dedicated jig rod in the lineup. I've read and heard that the EMTF isn't ideally suited for fishing jigs over 1/2 oz but Kickerfish has experience with that rod and has weighed in so I'd consider his feedback. The Xheavy Jig and Work also seems to meet your specs, but I've been told the Perfect Pitch does all the same things, some better, and is more balanced.
I have the Diablo and so far love it. I think it is and will be one of my favorite rods. I got to be more of a dedicated jig and worm rod for lighter jigs/trigs in moderate cover. Gary helped me confirm it would work well for my needs and it's still versatile enough to do all the things Kickerfish listed for the EMTF and even throw lipless and squarebills in a pinch. Unfortunately I haven't had a ton of on water time with because my we just had a baby and I'm not fishing much. Some have said its just a touch not moderate then the EMTF. Some have said its taper is more like the Spinnerbait Special but having both I totally disagree, the SS is def in more moderate, has a softer tip and a bit less power in my hands. I'm not sure if the Diablo would handle the 3/4 oz jigs too well, for that weight I'd definitely pick up my Tour Versatile. The TV is another 7' rod you may want to consider that has the power to meet your needs. I use it for Carolina rigs, frogs, heavier trigs/jigs, and heavier cover fishing with success.
I love my XX rods and I'm sure one of them will suit your needs if you want to try them. The build quality and finish are too notch and as good as they come. You may want to ask Gary about and look into the Jackson Rods Super Trickster series, The Tackle Trap is the first US distributor if these JDM rods and. I've read some great things about them. I believe they have a couple 7' or 6'10" rods that may suit your needs.
Good luck and let us know what you end up with and how you like it. Oh and fair warning...you can't own just 1 Megabass rod.