Massive stars in the SDSS-V survey: New O2 stars in the Large Magellanic Cloud

{O2 stars define the hottest end of the normal O-star sequence, but their identification requires blue-optical nitrogen diagnostics absent from many surveys.} {We reassess three luminous Large Magellanic Cloud (LMC) sources with multi-epoch Sloan Digital Sky Survey V (SDSS-V) spectroscopy obtained with the Baryon Oscillation Spectroscopic Survey (BOSS) spectrographs: \wsi, \lh, and \sk.} {We measure visit-resolved radial velocities and H, He, and N equivalent widths (EWs), compare robust combinations with LMC O2 templates at a common effective resolution, and use OSTAR2002 spectral energy distribution (SED) fits and a Gaia colour–magnitude diagram (CMD) as broad-band checks.} {The weighted $\log \mathrm{\mid }\mathrm{E}\mathrm{W}(\text{niv}\lambda 4058)\mathrm{/}\mathrm{E}\mathrm{W}(\text{niii}\lambda 4640)\mathrm{\mid }$ values are $0.64\pm 0.29$, $0.48\pm 0.23$, and $0.34\pm 0.44$ for \wsi, \lh, and \sk. The detection of \nv~$\lambda \lambda 4604,4620$ supports the O2~If${}^{\ast }$ and O2~V–III classifications adopted for \wsi\ and \lh, respectively. For \sk, the uncertain \niv/\niii\ ratio and non-detection of \nv\ motivate O2–3~V–III. Weak \hei~$\lambda 4471$ may indicate unresolved later-type contamination in \wsi\ and \sk. The radial velocities of \sk\ show suggestive but non-significant variability. OSTAR2002 fits over 45–55~kK and the Gaia CMD place all three sources in the luminous very-early-O regime; \wsi\ shows a strong mid-infrared (MIR) excess, \lh\ is nearly photospheric, and \sk\ shows only a modest $3$–$8\mu$m excess.} {The BOSS spectra add \wsi\ and \lh\ to the LMC very-early-O population and identify \sk\ as an additional O2–3 source. These cases show how incomplete blue coverage and ambiguous catalogue associations can conceal the hottest massive stars.}