I recently picked up Odyssey after coming back to Elite after a long break. Looking to sample the exobiology side of the expansion I needed to choose a ship. For this role there isn't much that is essential. Lots of things you might want or like to have, like jump range, cool running, AFMU, rovers and so on, but as I soon found out none of that is necessary.
I ran the rule over half my fleet it seems, deciding on which ship would make the cut, and the answer would not surprise
-- Dolphin. Nearly perfect. Small, good jump, runs very cool (12% heat) and has the optional internals to pack in the stuff you'll want to take along. But it is so finely engineered to run fast and cool that adding the hangar exceeds retracted power limit. I could solve this with a different power plant but then the ship loses its mojo.
-- Courier. I have a very fast one (800 boost) and I thought that might be useful for quickly traversing planets looking for the exo sites. Can fit a rover, good shields, decent integrity and acceptable jump.
-- Krait II. What can't this ship do? Has everything you need. Jump's in the 40s though and I wanted more reach.
-- Type 6. Got this for free from a CG a couple years ago and have never found a role for it. This could work, but then when I look at it from the outside, like on foot on a planet or in the hangar, it fails to inspire, to put it diplomatically.
-- Orca. High speed, great jump, runs super cool, but too big for landing.
-- Phantom. Probably a good choice and another ship I keep despite having no role for it. But the more I thought about it, the more I knew whatever I picked should be small landing footprint. Just makes sense.
I considered and rejected a few more, like DBS and Python for various reasons.
In the end the answer was the same as it would always be, the DBX. Even with a rover it jumps 70, runs very cool, and I secretly think I have the fastest DBX around, so cruising above the surface looking for another patch of bacterium is a snap. AFMU, rover, everything I need in a compact lander with exceptional jump range.
So yeah, DBX for me.