The 144,000 would be the Barley, not the Wheat.
I disagree, and have pointed out how 1) the wording in Rev14:4 parallels the SECOND of the two mentions of "firstfruit" in Lev23 (that of v.17 [and THIS is contrasted with the wording of that of 1Cor5:7 stated factually OF "the Church WHICH IS HIS BODY [the 'ONE BODY']"]); and 2) that Paul goes to great lengths to show "OUR identification" with Christ (as the "ONE BODY"/"the Church WHICH IS HIS BODY" [and in numerous other ways and details of [/found in] his assigned task of "writings" [epistles]), noting that Eph1:10 is not speaking of the "NOW" ["in this present age [singular]"] like the rest of that epistle is speaking to...
You have this exactly backwards
(...which is what happens when we zero our focus too narrowly on the events of the 2nd half of the 7-yr trib, IMHO).
"The 144,000" [yet future, and future to "our Rapture" as well!] are NOT the "FIRST of the firstfruit"