@elliotrock,
my personal favorite of the Samsung’s supported by /e/ OS is the Galaxy S8+ SM-G955F “dream2lte”. Why? Because for the S8+ the /e/ OS version 9-pie will be available soon. The tests¹ are already running.
The displays are the same size: 6.2" (full rectangle); 2960 x 1440 (Quad HD+), dual edge Super AMOLED display, the performance of the S8+ more than enough.
The S9+ on the other hand still works with /e/ OS 8-oreo. A migration to 9-pie is planned, but it will probably take some more time for the S8+
¹Tests with /e/ OS ROM e-0.8-pie on my S8 plus “dream2lte” are very satisfying, except for a few small things.
S8+ LTE-Band
B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B17(700), B18(800), B19(800), B20(800), B25(1900), B26(850), B28(700), B32(1500), B66(AWS-3)
S8+ 4G TDD LTE
B38(2600), B39(1900), B40(2300), B41(2500)