Ironclad are excellent, and represent 1890 onwards. Redoubt and HLBS (if you can lay your hands on HLBS - they are the only real cavalry option too), are also good. Redoubt are on the big side though. Both are late 1870s-1881 (or engineer or volunteer units up to 1899/1900). Tradition are tall, but realistically proportioned (so thin compared to other minis of the same height), and are post 1881 (they go all the way to 1908 as the rifle is not detailed enough to be specific).
The Old Glory Royal Marines are smaller than all the others, and have an RM four pocket undress jacket on - which was a dark blue affair. There were no four pocket red coats in either arm for enlisted ranks.
Of course, if you are not that worried by accuracy, you could mix them all in. If you are interested in accuracy, the artillerymen from Ironclad and Redoubt have points on their helmets, when they should have balls
Chris