Is the steerer tube on the LHT cut? If not, have you raised your handlebars to top of steerer tube, or exchanged the stem on the LHT for one that is more upright (highrise) and closer to the steerer?
Also, is your ride comfortable on the hoods? Maybe a shallower dropbar would work, like the Salsa Cowchipper or the Woodchipper.
Is the LHT a good fit for you - is the top tube too long? If yes, that will bend you over more, so a shorter top tube would help.
If you are leaning toward a new bike, do compare the effective top tube length of the new bikes to your LHT and troll. If the top tubes are the same or longer, then you won't get a more upright position unless you have a longer steerer tube and upright/highrise stem.